Cooking, unless entertaining a voluptuary (7)
I believe the answer is:
sensual
'voluptuary' is the definition.
'cooking unless entertaining a' is the wordplay.
'cooking' is an anagram indicator.
'entertaining' indicates putting letters inside.
'unless' anagrammed gives 'sensul'.
'sensul' going around 'a' is 'SENSUAL'.
(Other definitions for sensual that I've seen before include "Unseals (anag.)" , "Marked by bodily appetites" , "Relating to touch, etc" , "Voluptuous - erotic - animal" , "creating gratification" .)