Many young men bringing in nothing (5)
I believe the answer is:
loads
'many' is the definition.
'young men bringing in nothing' is the wordplay.
'young men' becomes 'lads' (I've seen this before).
'bringing in' indicates putting letters inside.
'nothing' becomes 'o' (looks like zero - 0).
'lads' going around 'o' is 'LOADS'.
(Other definitions for loads that I've seen before include "very much" , "things to be carried" , "a lot" , "bags" , "Tons, lots" .)