Oppose (6)
'oppose' is the definition.
(resisting is a kind of opposing)
This is the entire clue.
(Other definitions for resist that I've seen before include "Combat" , "Stand up to, fight against" , "Express opposition" , "Offer opposition to" , "Put up opposition, defy" .)
'oppose' is the definition.
(naysayers oppose something)
This is all the clue.
(Other definitions for naysay that I've seen before include "refuse" , "Deny" , "refusal" .)
'oppose' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for counter that I've seen before include "Conversely" , "Marker in a game; opposing" , "Game piece; oppose" , "return attack" , "check" .)