So-called bank needing help with no limits is nonsense (8)
I believe the answer is:
doggerel
'is nonsense' is the definition.
(I've seen this before)
'so-called bank needing help with no limits' is the wordplay.
'so-called bank' becomes 'dogger' (Dogger Bank is a sandbank in the North Sea).
'needing' is a charade indicator (letters next to each other).
'with no limits' indicates the central letters (the sides or limits of the word are removed).
The centre of 'help' is 'el'.
'dogger'+'el'='DOGGEREL'
(Other definitions for doggerel that I've seen before include "questionable verse" , "trivial lines" , "lines of inferior quality" , "Verse lacking artistry" , "Poor poetry" .)