Money always used to apply pressure (5)
I believe the answer is:
lever
'to apply pressure' is the definition.
I can't judge whether this defines the answer.
'money always' is the wordplay.
'money' becomes 'l' (L can mean 'pounds').
'always' becomes 'ever' (synonyms).
'l'+'ever'='LEVER'
'used' is the link.
Can you help me to learn more?
(Other definitions for lever that I've seen before include "Revel in moving bar" , "Means of exerting force" , "exert force, in a way" , "Revel with prising tool" , "Purchase from bar" .)