Perhaps ham is somewhat unsatisfactory (5)
I believe the answer is:
actor
'perhaps ham' is the definition.
(I know that ham actor is a type of actor)
'somewhat unsatisfactory' is the wordplay.
'somewhat' says the answer is hidden in the clue.
'ACTOR' can be found hidden inside 'unsatisfactory'.
'is' is the link.
(Other definitions for actor that I've seen before include "Performer in drama" , "For example, Colman" , "ham" , "Thespian, stage performer" , "Thesp" .)