Asian art found in Thai mag I rolled up (7)
I believe the answer is:
origami
'asian art' is the definition.
'in thai mag i rolled up' is the wordplay.
'in' indicates the answer is hidden within the clue.
'up' is a reversal indicator (in down clue: letters go upwards).
'imagiro' is hidden within 'thai mag i rolled'.
'imagiro' written backwards gives 'ORIGAMI'.
'found' acts as a link.
(Other definitions for origami that I've seen before include "Jap. paper-folding art" , "US record label" , "Creation of objects from paper" , "Artistic paper folding" , "Japanese craft of paper-tearing" .)