Gasping about one work of art (8)
I believe the answer is:
painting
'work of art' is the definition.
(I've seen this before)
'gasping about one' is the wordplay.
'gasping' becomes 'panting' ('pant' can be a synonym of 'gasp').
'about' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'panting' going around 'i' is 'PAINTING'.
(Other definitions for painting that I've seen before include "Work of art" , "image?" , "Graphic art" , "Work of a kind" , "Artwork" .)