Tradesman concerned with overheads (5)
I believe the answer is:
tiler
'tradesman' is the definition.
Both the answer and definition are singular nouns.
Maybe there's a link between them I don't understand?
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for tiler that I've seen before include "Workman who fixes glazed rectangles in bathrooms" , "Craftsman" , "Worker who lays small squares" , "Roofer" , "Roof-worker" .)