Young fellow making money nowadays (3)
I believe the answer is:
lad
'young fellow' is the definition.
(I've seen this before)
'money nowadays' is the wordplay.
'money' becomes 'l' (L can mean 'pounds'**).
'nowadays' becomes 'ad'.
'l'+'ad'='LAD'
'making' is the link.
(Other definitions for lad that I've seen before include "Scottish lover" , "Boy or youth" , "Shaver" , "Boy, familiar" , "Chap, fellow" .)