Unusual slice taken from cut of beef? (3)
I believe the answer is:
rum
'unusual' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for rum that I've seen before include "Bizarre" , "Peculiar like sailor's drink (3)" , "Pirate's grog" , "Sugar-cane product" , "Eerie" .)