Sailor may snatch rum (9)
I believe the answer is:
yachtsman
'sailor' is the definition.
(yachtsman is a kind of sailor)
'may snatch rum' is the wordplay.
'rum' indicates anagramming the letters (rum can mean strange or unusual).
'may'+'snatch'='maysnatch'
'maysnatch' with letters rearranged gives 'YACHTSMAN'.
(Other definitions for yachtsman that I've seen before include "Ainslie, for example" , "(Recreational) sailor" , "Male sailor" , "I may go round the world" , "One handling recreational sailing vessel" .)