Crossword Genius

Strange bottom, bottom not to be seem! (3)

Ross

I believe the answer is:

rum

'strange' is the definition.
(synonyms)

I cannot understand how the rest of the clue works.

(Other definitions for rum that I've seen before include "Queer" , "Odd, like sailor's drink" , "Sugar-cane spirit" , "Eerie" , "Bizarre" .)

I've seen this clue in The Times.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.