Bank of Scotland’s courageous? Not very (4)
I believe the answer is:
brae
'bank of scotland's' is the definition.
(Scottish term for a bank or hillside)
'courageous? not very' is the wordplay.
'courageous?' becomes 'brave' (synonyms).
'not' indicates named letters should be taken away.
'very' becomes 'v' (abbreviation).
'brave' with 'v' taken out is 'BRAE'.
(Other definitions for brae that I've seen before include "Bare on Scottish hillside" , "Steep Scots hillside" , "Steep bank or hillside" , "Bank of Scotland" , "Slope on hill or in glen" .)