Musical talent appears in Liskeard (3)
I believe the answer is:
ear
'musical talent' is the definition.
(as in 'having an ear' for music)
'in liskeard' is the wordplay.
'in' indicates a hidden word.
'EAR' can be found hidden inside 'liskeard'.
'appears' acts as a link.
(Other definitions for ear that I've seen before include "Part of corn plant" , "Shell-like (slang)" , "Ability to recognise sounds" , "Listening organ" , "Heed" .)