Activity and action around a flight? (9)
I believe the answer is:
staircase
'a flight?' is the definition.
(flight is a kind of staircase)
'activity and action around' is the wordplay.
'activity' becomes 'case' (case is a kind of activity).
'and' says to put letters next to each other (I've seen this in other clues).
'action around' becomes 'stair' (I can't explain this - if you can you should give a lot more credence to this answer).
'case' after 'stair' is 'STAIRCASE'.
Can you help me to learn more?
(Other definitions for staircase that I've seen before include "Route between floors" , "exited via this?" , "It's Caesar (anag.)" , "Flight of steps" , "part of the mansion?" .)