Note banks periodically loth to give a bit of capital (4)
I believe the answer is:
soho
'give a bit of capital' is the definition.
The definition suggests a singular noun which matches the answer.
'note banks periodically loth' is the wordplay.
'note' becomes 'so' (musical note).
'banks' is an insertion indicator (bank can mean to surround).
'periodically' indicates alternate letters (letters must be selected 'every so often').
The alternate letters of 'loth' are 'oh'.
'so' going around 'oh' is 'SOHO'.
'to' is the link.
Can you help me to learn more?
(Other definitions for soho that I've seen before include "Colourful district in central London" , "London night life area" , "(Formerly) disreputable area of London" , "capital district" , "Central London or Manhattan district" .)