Steal from Conor O'Brien (3)
I believe the answer is:
rob
'steal' is the definition.
(I know that rob is a more specific form of the action steal)
'from conor o'brien' is the wordplay.
'from' says the answer is hidden in the clue.
'ROB' is hidden in the letters of 'conor obrien'.
(Other definitions for rob that I've seen before include "Steal from (someone)" , "Plunder" , "Steal violently" , "boy's name" , "Steal or purloin" .)