Although Clay’s parentage and early life remain largely obscure, it seems that he was probably of Cornish origins and trained as a lawyer. From the early 1430s onwards he regularly practiced as an attorney in the court of King’s bench, and his clients, who were almost uniformly drawn from the ranks of the south-western gentry, included men like John Colshull*, Roger Champernowne*, John Jaybien† and John Cork*.
It is unlikely that Clay (of whose landholdings – if any – nothing is known) fulfilled the statutory requirement for residency in any of the boroughs he represented in Parliament. There can be little doubt that it was Aysshton (who had represented Helston four times between 1422 and 1427) who engineered his servant’s first return for the same borough in 1433. Likewise, Clay probably had his master to thank for his election for Liskeard in 1437, although he evidently also possessed independent connexions locally, for in the months after the dissolution he appeared in the court of King’s bench as attorney for members of the Trethewy family who were of some importance in Liskeard and its hinterland.
It is more difficult to explain Clay’s two successive returns in November 1449 and 1450 for the Devon borough of Plympton Erle, a pocket borough under the control of the earl of Devon, Thomas Courtenay, who at this time was taking an active part in parliamentary politics, securing the return of his retainers for a number of urban constituencies. By contrast with these comital servants, Clay is not known to have had direct links with Courtenay, but it is possible that it was once again Aysshton (by now a justice of common pleas) who through his professional connexions with some of the leading members of the earl’s council, such as Nicholas Radford* and John Copplestone*, was able to recommend him for election.
On other occasions, too, Clay conducted his private business alongside his parliamentary duties, and while the Commons were in session he was often found in the law courts in Westminster Hall. Although initially employed by the gentry and nobility chiefly in conjunction with Aysshton, by the later 1440s Clay was established as a lawyer in his own right, and regularly acted for the landowners of south-western England.
