One is grabbed by deranged girl (4)
I believe the answer is:
maid
'girl' is the definition.
(maid is a kind of girl)
'one is grabbed by deranged' is the wordplay.
'one' becomes 'I' (Roman numeral).
'is grabbed by' indicates putting letters inside.
'deranged' becomes 'mad' (both can mean mentally disturbed).
'i' placed within 'mad' is 'MAID'.
(Other definitions for maid that I've seen before include "Young woman - servant" , "Damsel" , "- - -of-all-work" , "Female domestic servant" , "One in service" .)