Frightened and traumatised, one runs away (6)
I believe the answer is:
scared
'frightened' is the definition.
(scared means frightened or fearful)
'traumatised one runs away' is the wordplay.
'traumatised' becomes 'scarred' (I've seen this in another clue).
'one runs' becomes 'r' (cricket abbreviation).
'away' is a deletion indicator.
'scarred' with 'r' taken out is 'SCARED'.
'and' acts as a link.
(Other definitions for scared that I've seen before include "Thing which precipitates an event" , "Fearful, anxious" , "Frightened, alarmed" , "having kittens" , "Afraid of cedars" .)