Dirge about a bank (5)
I believe the answer is:
ridge
'a bank' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'dirge about' is the wordplay.
'about' is an anagram indicator.
'dirge' with letters rearranged gives 'RIDGE'.
Can you help me to learn more?
(Other definitions for ridge that I've seen before include "Elongated area of high pressure" , "Narrow elevated strip" , "Raised strip between two furrows" , "Feature of mountain" , "Narrow raised strip or elongated region" .)