Number gathering on the way to enlightenment? (5)
I believe the answer is:
dozen
'number' is the definition.
(dozen is a kind of number)
'gathering on the way to enlightenment?' is the wordplay.
'gathering' becomes 'do' (party, social gathering of people).
'on' says to put letters next to each other.
'the way to enlightenment?' becomes 'zen' (I've seen this in another clue).
'do'+'zen'='DOZEN'
(Other definitions for dozen that I've seen before include "XII" , "One less than 13" , "See 4" , "Set of twelve" , "A number of disciples" .)