Had us traumatised about dirt (4)
I believe the answer is:
dust
'dirt' is the definition.
(dust is a kind of dirt)
'had us traumatised about' is the wordplay.
'about' indicates the answer is hidden within the clue (the clue goes around or about the answer).
'DUST' is hidden within 'had us traumatised'.
(Other definitions for dust that I've seen before include "Do some housework - we all come to it!" , "Our mortal body" , "Stud (anag)" , "Powdery dirt in dry areas" , "Powdered eart" .)