Calls for works to be heard (5)
I believe the answer is:
needs
'calls for' is the definition.
('need' can be a synonym of 'call for')
'works to be heard' is the wordplay.
'works' becomes 'kneads' (to knead dough is to work it into a shape).
'to be heard' indicates a 'sounds like' (homophone) clue.
'kneads' sounds like 'NEEDS'.
(Other definitions for needs that I've seen before include "What is required" , "What we require" , "Requirements" , "Is desperate for" , "Calls for" .)