One often seen out on the tiles? (6)
I believe the answer is:
roofer
'one' is the definition.
Although both the answer and definition are singular nouns, I don't understand how one could define the other.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for roofer that I've seen before include "One works on the top of a house" , "High-level building worker" , "One putting top on building" , "eg Thatcher" , "Person working on top of a house" .)