School to listen to money-lender (5)
I believe the answer is:
shark
'money-lender' is the definition.
(synonyms)
'school to listen' is the wordplay.
'school' becomes 'S'.
'to listen' becomes 'hark' (harking is a kind of listening).
's'+'hark'='SHARK'
'to' acts as a link.
(Other definitions for shark that I've seen before include "Predatory creature" , "Predatory fish (or person?)" , "Ferociously predatory fish" , "(Fishy) extortionist" , "Unscrupulous greedy person" .)