Chap out on roof newly illuminated from the ground? (5)
I believe the answer is:
tiler
'chap' is the definition.
'on roof newly illuminated from the ground?' is the wordplay.
I cannot really see how this works, but
'roof' could be 'tile' (tile roof is a kind of roof) and 'tile' is found in the answer.
A single letter 'r' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
'out' acts as a link.
Can you help me to learn more?
(Other definitions for tiler that I've seen before include "Workman who fixes glazed rectangles in bathrooms" , "Roof-worker" , "Masons' doorkeeper" , "doorkeeper at lodge" , "High-level operator" .)