Acceptable to mate on a bench? (9)
I believe the answer is:
palatable
'acceptable' is the definition.
(I've seen this before)
'mate on a bench?' is the wordplay.
'mate' becomes 'pal' (I've seen this in another clue).
'on' means one lot of letters go next to another.
'bench?' becomes 'table' (bench is a kind of table).
'pal'+'a'+'table'='PALATABLE'
'to' acts as a link.
(Other definitions for palatable that I've seen before include "Pleasant to the taste, acceptable" , "pleasing" , "Of food, tasting nice; of idea, acceptable" , "Tasty" , "good to eat" .)