Answer:

expert

AnswerCrossword Clue
EXPERTPro
EXPERTAce
EXPERTAdept practitioner
EXPERTWhiz
EXPERTKind of witness
EXPERTGuru
EXPERTCrossword puzzle solver with a pen, often
EXPERTSkillful
EXPERTMaster hand
EXPERTConsultant, probably
EXPERTGo-to guy
EXPERTPaid witness, perhaps
EXPERTMaven
EXPERTProficient.
EXPERTMaster.
EXPERTAuthority.
EXPERTMaster hand.
EXPERTQuiz contestant.
EXPERTOne in the know.
EXPERTAce.
EXPERTSkilled.
EXPERTSpecialist
EXPERTMan who knows
EXPERTSkilled one
EXPERTAuthority
EXPERTHighly skilled
EXPERTBlack belt, say
EXPERTMasterful
EXPERTPuzzle-solving level
EXPERTKnow-nothing's opposite
EXPERTOld hand
EXPERTOld pro
EXPERTType of witness
EXPERTBlack belt
EXPERTCrackerjack
EXPERTAficionado