Also endlessly sketched saint (6)
I believe the answer is:
andrew
'saint' is the definition.
(St Andrew is an example)
'also endlessly sketched' is the wordplay.
'also' becomes 'and' (I've seen this in another clue).
'endlessly' means to remove the last letter.
'sketched' becomes 'drew' (I've seen this before).
'and' with its final letter taken off is 'an'.
'an'+'drew'='ANDREW'
(Other definitions for andrew that I've seen before include "November thirtieth is this saint's day" , "Warden (anag.)" , "Boy's name" , "Composer of many musicals ..." , "holy man" .)