Trimmed around lip (3)
I believe the answer is:
rim
'lip' is the definition.
(synonyms)
'trimmed around' is the wordplay.
'around' indicates the answer is hidden within the clue.
'RIM' can be found hidden inside 'trimmed'.
(Other definitions for rim that I've seen before include "Flange" , "Upper or outer edge" , "An edge, canyon or cup" , "Edge, border" , "Brink" .)