Accept less rum in glasses (10)
I believe the answer is:
spectacles
'glasses' is the definition.
(synonyms)
'accept less rum' is the wordplay.
'rum' is an anagram indicator (rum can mean strange or unusual).
'accept'+'less'='acceptless'
'acceptless' anagrammed gives 'SPECTACLES'.
'in' is the link.
(Other definitions for spectacles that I've seen before include "What would make some people see better" , "they make things easier to read" , "With which to view" , "may be before one's eyes" , "Glasses - showy displays" .)