Face a mogul, agitated, in disguise (10)
I believe the answer is:
camouflage
'disguise' is the definition.
(I know that camouflage is a more specific form of the action disguise)
'face a mogul agitated' is the wordplay.
'agitated' is an anagram indicator.
'face'+'a'+'mogul'='faceamogul'
'faceamogul' with letters rearranged gives 'CAMOUFLAGE'.
'in' acts as a link.
(Other definitions for camouflage that I've seen before include "Means of disguise" , "Method of blending in fine" , "Green and brown on a green and brown background, say?" , "blind" , "Disguise (from enemy)" .)