Fleece that is for new recruit (6)
I believe the answer is:
rookie
'new recruit' is the definition.
(I've seen this before)
'fleece that is' is the wordplay.
'fleece' becomes 'rook' (I've seen this before).
'that is' becomes 'i.e.' (synonyms).
'rook'+'ie'='ROOKIE'
'for' acts as a link.
(Other definitions for rookie that I've seen before include "Army or police recruit" , "Callow recruit" , "New recruit as to army" , "untested type" , "Slang for a new recruit" .)