Round relative sheds pound in weight (5)
I believe the answer is:
ounce
This could be a double definition.
'round relative sheds pound' is the first definition.
'ounce' can be an answer for 'pound' (thesaurus). I'm not certain of the 'round relative sheds' bit.
'weight' is the second definition.
(unit of weight)
'in' acts as a link.
Can you help me to learn more?
(Other definitions for ounce that I've seen before include "scrap" , "Jaguar" , "small portion" , "Panther, perhaps" , "prowler" .)