He does cover-up work in futile rage (5)
I believe the answer is:
tiler
'he does cover-up work' is the definition.
The definition suggests a singular noun which matches the answer.
'in futile rage' is the wordplay.
'in' indicates a hidden word.
'TILER' is hidden in the letters of 'futile rage'.
Can you help me to learn more?
(Other definitions for tiler that I've seen before include "Worker who lays small squares" , "Craftsman" , "Workman who fixes glazed rectangles in bathrooms" , "Tradesman who covers roofs or bathroom walls with rectangular materials" , "High-level operator" .)