Bespoke old wine served with rump (8)
I believe the answer is:
tailored
'bespoke' is the definition.
(synonyms)
'old wine served with rump' is the wordplay.
'old' becomes 'o' (abbreviation).
'wine' becomes 'red wine' (red is a type of wine).
'served with' is a charade indicator (letters next to each other).
'rump' becomes 'tail' (synonyms).
'o'+'red'='ored'
'ored' put after 'tail' is 'TAILORED'.
(Other definitions for tailored that I've seen before include "Made garments, suits perhaps" , "Suited to an individual" , "(Of clothes) fitted, well cut" , "Simple in line or design, suit perhaps" , "Adapted" .)