Stew of manioc brought in to support contribution to protein
I believe the answer is:
amino acid
'to protein' is the definition.
(thesaurus)
'stew of manioc brought in to support' is the wordplay.
'stew of' indicates anagramming the letters (I've seen this in other clues).
'brought in' indicates putting letters inside.
'to support' becomes 'aid' (aiding is a kind of supporting**).
'manioc' with letters rearranged gives 'minoac'.
'minoac' placed inside 'aid' is 'AMINO-ACID'.
'contribution' acts as a link.
I am not very happy about this link. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for amino acid that I've seen before include "source of protein required?" , "Organic compound in proteins" , "Chemical" , "compound for life" , "Basic protein constituent" .)