Sponsors my colleague joining sport? (5)
I believe the answer is:
funds
'sponsors' is the definition.
(I've seen this in another clue)
'my colleague joining sport?' is the wordplay.
I cannot really understand how this works, but
'sport?' could be 'fun' (synonyms) and 'fun' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for funds that I've seen before include "Finances" , "Liquid assets" , "Available cash" .)