Clot's actual ego damaged (9)
I believe the answer is:
coagulate
'clot's' is the definition.
(I've seen this before)
'actual ego damaged' is the wordplay.
'damaged' indicates anagramming the letters.
'actual'+'ego'='actualego'
'actualego' anagrammed gives 'COAGULATE'.
(Other definitions for coagulate that I've seen before include "Congeal" , "Cause to clot" , "Clot in catalogue" , "Thicken or clot, like blood" , "Change from liquid into semi-solid as in catalogue" .)