Outrageous gear seen around in colour (3,5)
I believe the answer is:
sea green
'colour' is the definition.
(I know that sea green is a colour)
'outrageous gear seen around' is the wordplay.
'outrageous' indicates an anagram (an outrageous spelling).
'around' is an insertion indicator.
'gear' anagrammed gives 'agre'.
'agre' inserted into 'seen' is 'SEA-GREEN'.
'in' acts as a link.
(Other definitions for sea green that I've seen before include "Robespierre such an incorruptible (Carlyle)" , "Robespierre's shade" , "Geese ran (anag) - colour" , "Marine colour" .)