While wine goes round call for bitter (10)
I believe the answer is:
astringent
'for bitter' is the definition.
(I've seen this before)
'while wine goes round call' is the wordplay.
I cannot really understand how this works, but
'while' could be 'as' (eg 'while I walked' means 'as I walked') and 'as' is present in the answer.
'round' could be 'ring' (synonyms) and 'ring' is present in the answer.
'wine' could be 'tent' (type of Spanish wine) and 'tent' is found in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for astringent that I've seen before include "Harsh" , "Sharp or severe in manner" , "for checking bleeding" , "Styptic" , "(Medication) causing contraction - stern giant (anag)" .)