One who has a job to hang curtains? (6)
I believe the answer is:
draper
'one who has a job to hang curtains?' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'one who has a' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'a' (a thing is one thing) and 'a' is found in the answer.
'who' could be 'dr' (from TV series Doctor Who) and 'dr' is present in the answer.
'a' could be 'per' (eg 'one a day' means 'one per day') and 'per' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for draper that I've seen before include "Seller of cloth" , "Shopkeeper" , "Material businessman" , "Dealer in cloth and clothing" , "He sells fabrics" .)