The man who remits the change? (6)
I believe the answer is:
mister
'the man' is the definition.
(mister is a kind of man)
'remits the change?' is the wordplay.
'the change?' is an anagram indicator (I've seen 'changes' mean this).
'remits' with letters rearranged gives 'MISTER'.
'who' acts as a link.
(Other definitions for mister that I've seen before include "Male form of address" , "Mr" , "Bloke" , "Merits of form of address to man" , "Set rim (anag.)" .)