Sidestep a big hole (5)
I believe the answer is:
avoid
'sidestep' is the definition.
(thesaurus)
'a big hole' is the wordplay.
'big hole' becomes 'void'.
'a'+'void'='AVOID'
(Other definitions for avoid that I've seen before include "Refrain from (something)" , "Stay clear of" , "invalidate" , "Run away from" , "Get out of" .)