He'll be round for the money all right (5)
I believe the answer is:
bloke
'he'll' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'round for the money all right' is the wordplay.
'round' is an insertion indicator.
'for' becomes 'be' (I can't explain this - if you can you should give a lot more credence to this answer).
'the money' becomes 'l' (L can mean 'pounds').
'all right' becomes 'ok' (synonyms).
'l'+'ok'='lok'
'be' enclosing 'lok' is 'BLOKE'.
'be' is the link.
Can you help me to learn more?
(Other definitions for bloke that I've seen before include "British fellow or chap" , "Man (colloq.)" , "Fellow (informal)" , "Chap, lad" , "Geezer" .)
