Bar on a flight (5,3)
I believe the answer is:
stair rod
'bar' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see a link between them that I don't see?
'flight' is the wordplay.
I cannot really understand how this works, but
'flight' could be 'stair' (I've seen this before) and 'stair' is found in the answer.
The remaining letters 'rod' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'on a' acts as a link.
Can you help me to learn more?
(Other definitions for stair rod that I've seen before include "Fixture between riser and treader" , "Fixture on flight" , "Securer for carpet" , "seeming to come down in heavy rain" , "As torrid (anag.)" .)