Greasy spoon sold wraps in support of workers (8)
I believe the answer is:
scaffold
'support of workers' is the definition.
'scaffold' can be an answer for 'support' (I've seen this before). I'm not certain of the 'of workers' bit.
'greasy spoon sold wraps' is the wordplay.
'greasy spoon' becomes 'caff' (I've seen this in other clues).
'wraps' is an insertion indicator (inserted letters get wrapped up).
'caff' inserted into 'sold' is 'SCAFFOLD'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for scaffold that I've seen before include "Platform refreshment" , "Platform on which criminals were once hung" , "Execution platform" , "Temporary erection for workmen - gallows" , "Temporary structure around a building" .)