Stripped, going around grammes lighter (5)
I believe the answer is:
barge
'lighter' is the definition.
(synonyms)
'stripped going around grammes' is the wordplay.
'stripped' becomes 'bare' (synonyms).
'going around' means one lot of letters goes inside another.
'grammes' becomes 'g' (abbreviation).
'bare' placed around 'g' is 'BARGE'.
(Other definitions for barge that I've seen before include "Jostle; a boat" , "River transport" , "Canal boat, towed along (5)" , "force" , "Shove, lighter" .)