Sunbed, possibly, in old money (6)

I believe the answer is:

tanner

I'm a little stuck... Click here to teach me more about this clue!

'money' is the definition.
(I know that tanner is a type of coin)

I cannot understand how the rest of the clue works.

(Other definitions for tanner that I've seen before include "Curer of hides, maker of leather" , "Formerly 6d (sl.)" , "Leather worker -- old coin" , "Person who converts hides into leather" , "He makes leather from hides" .)

I've seen this clue in The Telegraph.

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.