Sentence:  But one cannot escape the suspicion that all this non-stop harping on the misdeeds of the long liquidated `` anti-party '' group would be totally unnecessary if there were not , inside the party , some secret but genuine opposition to Khrushchev on vital doctrinal grounds , on the actual methods to be <WSD>employed</WSD> in the `` transition to communism '' and , last but not least , on foreign policy . 
Meaning of the word marked with <WSD> tags:  put into service; make work or employ for a particular purpose or for its inherent or natural purpose