Strike out in fear, apparently (3)
I believe the answer is:
rap
'strike' is the definition.
(I know that strike can be written as rap)
'out in fear apparently' is the wordplay.
'out' indicates the answer is hidden within the clue (I've seen 'out of' mean this).
'RAP' is hidden in the letters of 'in fear apparently'.
(Other definitions for rap that I've seen before include "Pounding" , "African-American music in which the lyrics are spoken" , "Smack (knuckles)" , "Sharp knock; rebuke" , "Small amount" .)