Measure that sounds suitable (4)
I believe the answer is:
mete
'measure' is the definition.
(thesaurus)
'sounds suitable' is the wordplay.
'sounds' shows a homophone (sound like).
'suitable' becomes 'meet' ('meet' can be a synonym of 'suitable').
'meet' is a homophone of 'METE'.
'that' acts as a link.
(Other definitions for mete that I've seen before include "Dish (out)" , "Allot" , "boundary" , "To - out is to dispense (eg, justice)" , "Dispense, give (out)" .)