More for one with small part (5)
I believe the answer is:
extra
This clue might be a double definition.
'more' is the first definition.
(I've seen this before)
'one with small part' is the second definition.
'extra' can be an answer for 'part' (I have seen 'Minor part' mean 'extra' so perhaps 'part' could also mean 'extra'). I'm not certain of the 'one with small' bit.
'for' is the link.
(Other definitions for extra that I've seen before include "not included" , "he plays his part" , "More than usual" , "One has no lines" , "Spare" .)