Sporting a new rig out (7)
I believe the answer is:
wearing
'sporting' is the definition.
(I've seen this before)
'a new rig out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'a'+'new'+'rig'='anewrig'
'anewrig' is an anagram of 'WEARING'.
(Other definitions for wearing that I've seen before include "sporting" , "Irksome" , "Trying" .)