Unable to choose actor needing part (4)
I believe the answer is:
torn
'unable to choose' is the definition.
(I've seen this in another clue)
'actor needing part' is the wordplay.
'part' indicates a hidden word.
'TORN' is hidden in the letters of 'actor needing'.
(Other definitions for torn that I've seen before include "In a state of uncertainty between two conflicting options" , "Undecided between two" , "Dance wear" , "Lacerated - in two minds" , "Removed forcibly" .)