Sweet child in brood cuddling soft toy’s head (6)
I believe the answer is:
moppet
'sweet child' is the definition.
(I've seen this before)
'brood cuddling soft toy's head' is the wordplay.
'brood' becomes 'mope' (I've seen this before).
'cuddling' is an insertion indicator.
'soft' becomes 'p' (musical abbreviation for 'piano').
'head' indicates taking the first letters.
The first letter of 'toys' is 't'.
'mope' going around 'p' is 'moppe'.
'moppe'+'t'='MOPPET'
'in' acts as a link.
(Other definitions for moppet that I've seen before include "Tot" , "The dear child met Pop" , "Little child" , "Endearingly sweet child" , "young child" .)