Number enjoy computer technology (5)
I believe the answer is:
digit
'number' is the definition.
(digit is a kind of number)
'enjoy computer technology' is the wordplay.
'enjoy' becomes 'dig' (slang).
'computer technology' becomes 'it' (abbreviation for information technology).
'dig'+'it'='DIGIT'
(Other definitions for digit that I've seen before include "a number less than ten" , "Finger; number" , "finger, perhaps" , "A small number" , "using 0 or 1 for example" .)