Independent bank promoting Head of Finance (4)
I believe the answer is:
free
'independent' is the definition.
(associated in meaning)
'bank promoting head of finance' is the wordplay.
'bank' means to remove the middle letters (I've seen 'banks of' mean this (the banks are the sides of the word)).
'promoting' becomes 'fighting for' (fighting for is a kind of promoting).
'head of finance' becomes 'ee' (I can't justify this - if you can you should give a lot more credence to this answer).
'fightingfor' with its centre taken out is 'fr'.
'fr'+'ee'='FREE'
Can you help me to learn more?
(Other definitions for free that I've seen before include "Sewn-on trimming" , "Unrestricted" , "Release; without cost" , "without payment" , "nought" .)