Musical talent demands attention (3)
I believe the answer is:
ear
This clue is a double definition.
'musical talent' is the first definition.
(as in 'having an ear' for music)
'attention' is the second definition.
(have the ear of someone is to have their attention)
'demands' is the link.
(Other definitions for ear that I've seen before include "Seed-bearing part of corn" , "Part of cereal plant containing seed" , "Sensory organ" , "'Give every man thine ..., but few thy voice' (Hamlet)" , "'Give every man thine ..., but few thy voice'/Hamlet" .)