Odd, rum (7)
I believe the answer is:
strange
This clue is a double definition.
'odd' is the first definition.
(I know that odd can be written as strange)
'rum' is the second definition.
(similar in meaning)
(Other definitions for strange that I've seen before include "Surreal" , "Funny" , "Peculiar; Morse's boss" , "Queer" , "Out of the ordinary" .)