Measure for fitting, say? (4)
I believe the answer is:
mete
'measure' is the definition.
(meting things out is measuring them out)
'fitting say?' is the wordplay.
'fitting' becomes 'meet' (meet can mean appropriate or apt).
'say?' shows a homophone (sound like) (I've seen 'saying' mean this).
'meet' sounds like 'METE'.
'for' acts as a link.
(Other definitions for mete that I've seen before include "Dispense, give (out)" , "boundary" , "Dole (out)" , "Measure" , "Give as due - say punishment" .)