Few establishments have a go (4)
I believe the answer is:
stab
'a go' is the definition.
(both can mean an attempt)
'few establishments have' is the wordplay.
'have' indicates a hidden word.
'STAB' is hidden in the letters of 'few establishments'.
(Other definitions for stab that I've seen before include "Plunge knife into" , "Strike with knife" , "pink" , "Run through - essay" , "Thrust (weapon into)" .)