Imagine setter's embracing left and right (6)
I believe the answer is:
seemly
'right' is the definition.
(thesaurus)
'imagine setter's embracing left' is the wordplay.
'imagine' becomes 'see' (seeing is a kind of imagining).
'setter's' becomes 'my' (I've seen this in other clues**).
'embracing' is an insertion indicator.
'left' becomes 'l' (common abbreviation).
'my' placed around 'l' is 'mly'.
'see'+'mly'='SEEMLY'
'and' is the link.
(Other definitions for seemly that I've seen before include "'Decorous, dignified (6)'" , "Appropriate" , "Fitting" , "Decorous, in good taste" , "Part of the foot" .)