Boy wearing fleece in child's drawer (6)
I believe the answer is:
crayon
'child's drawer' is the definition.
(something which draws)
'boy wearing fleece' is the wordplay.
'boy' becomes 'ray' ().
'wearing' indicates putting letters inside.
'fleece' becomes 'con' (I've seen this before).
'ray' put within 'con' is 'CRAYON'.
'in' is the link.
(Other definitions for crayon that I've seen before include "Drawing pen" , "Waxy pencil" , "pencil (13) [FRENCH]" , "Child's colouring stick" , "Writer" .)