Number enjoy something (5)
I believe the answer is:
digit
'number' is the definition.
(digit is a kind of number)
'enjoy something' is the wordplay.
'enjoy' becomes 'dig' (to dig can mean to appreciate or 'get').
'something' becomes 'it' (I've seen this in other clues).
'dig'+'it'='DIGIT'
(Other definitions for digit that I've seen before include "One's on hand" , "one of several at hand" , "Single figure - finger" , "Finger; numeral" , "using 0 or 1 for example" .)