What are you doing about promise broken by Rachel's on-off partner? (9)
I believe the answer is:
crossword
'what are you doing' is the definition.
(you are doing a crossword)
'about promise broken by rachel's on-off partner?' is the wordplay.
I cannot really understand how this works, but
'about' could be 'c' (abbreviation for circa) and 'c' is found within the answer.
'promise' could be 'word' (as in 'I give you my word') and 'word' is located in the answer.
'partner?' could be 's' and 's' is found within the answer.
The remaining letters 'ros' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for crossword that I've seen before include "(Usually) black and white puzzle" , "Letter puzzle" , "See 8, 20 ac, 1, 15 dn" , "Puzzle with squares" , "What's here" .)