First rogue, perhaps roguish, occasionally swiped rum (7)
I believe the answer is:
curious
'rum' is the definition.
(I know that rum can be written as curious)
'first rogue perhaps roguish' is the wordplay.
'first' is a charade indicator (letters next to each other).
'rogue' becomes 'cur' (both can mean a despicable person).
'perhaps roguish' becomes 'ious' (I can't explain this - if you can you should believe this answer much more).
'cur' next to 'ious' is 'CURIOUS'.
'occasionally swiped' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for curious that I've seen before include "with a great deal of interest!" , "Questioning" , "Eager to learn something" , "Eager to know; strange" , "Odd, rum" .)