Feline wearing new coat gets a piece (7)
I believe the answer is:
toccata
'a piece' is the definition.
(I know that toccata is a type of piece)
'feline wearing new coat' is the wordplay.
'feline' becomes 'cat' (cat is a kind of feline).
'wearing' means one lot of letters goes inside another.
'new' indicates an anagram.
'coat' anagrammed gives 'toca'.
'cat' inserted within 'toca' is 'TOCCATA'.
'gets' acts as a link.
(Other definitions for toccata that I've seen before include "technical challenge" , "High-speed keyboard piece" , "Series of musical runs and chords before a fugue" , "Baroque keyboard composition" , "Keyboard piece emphasising touch" .)