Where art is shown, including this person's bosom (8)
I believe the answer is:
intimate
'bosom' is the definition.
(synonyms)
'where art is shown including this person's' is the wordplay.
I cannot really understand how this works, but
'person' could be 'mate' (mate is a kind of person) and 'mate' is present in the answer.
The remaining letters 'inti' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
(Other definitions for intimate that I've seen before include "Sharing a close and affectionate friendship" , "Give hint to close friend?" , "Infer; personal" , "Private and personal like close acquaintanceship" , "Tip off" .)