Some stage nerves for Hackman? (4)
I believe the answer is:
gene
'hackman?' is the definition.
(I've seen this in another clue)
'some stage nerves for' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'GENE' can be found hidden inside 'stage nerves for'.
(Other definitions for gene that I've seen before include "The Selfish -- (Dawkins)" , "-- Pitney, singer" , "Factor controlling heredity carried by chromosome" , "Unit of heredity significance" , "- - Kelly, dancer" .)