Dicky's hostile (3)
I believe the answer is:
ill
I believe this is a double definition.
'dicky's' is the first definition.
(I've seen this before)
'hostile' is the second definition.
(ill can mean harmful or damaging)
(Other definitions for ill that I've seen before include "Faulty" , "Out of sorts" , "Imperfectly; unwell" , "Poorly" , "state of America" .)