Reward for waiting up for Eliot coming from old Scottish borough to industrial city in America (10)
I believe the answer is:
pittsburgh
'city in america' is the definition.
'Pittsburgh' can be an answer for 'city' (Pittsburgh is an example). I'm not certain of the 'in america' bit.
'reward for waiting up for eliot coming from old scottish borough to industrial' is the wordplay.
I cannot really see how this works, but
'eliot' could be 'ts' (TS Eliot) and 'ts' is found in the answer.
'borough' could be 'burgh' (burgh is a kind of borough) and 'burgh' is found within the answer.
The remaining letters 'pit' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for pittsburgh that I've seen before include "US industrial city" , "port" , "Pennsylvania city on the Ohio River" .)