Shot indiscreet suspect (10)
I believe the answer is:
iridescent
'shot' is the definition.
('iridescent' can be a synonym of 'shot')
'indiscreet suspect' is the wordplay.
'suspect' indicates anagramming the letters.
'indiscreet' anagrammed gives 'IRIDESCENT'.
(Other definitions for iridescent that I've seen before include "Like a rainbow" , "shimmering with colour" , "Showing luminous colours" , "Glittering with changing colours" , "Eye-catching" .)