Dirge composed for bank (5)
I believe the answer is:
ridge
'bank' is the definition.
'dirge composed' is the wordplay.
'composed' is an anagram indicator.
'dirge' is an anagram of 'RIDGE'.
'for' acts as a link.
(Other definitions for ridge that I've seen before include "there's a lot of pressure in it" , "Top line of roof" , "Elongated area of high pressure" , "roof-tree" , "Narrow raised strip or elongated region" .)