Answer: sniper

AnswerCrossword Clue
SNIPERHigh-precision rifle user
SNIPERRifleman.
SNIPERHidden shooter.
SNIPERUnseen enemy.
SNIPERGuerrilla, at times
SNIPERGunman of a sort
SNIPERVigorous critic
SNIPERHidden gunman
SNIPERCovert marksman
SNIPERLast-second bidder on eBay
SNIPEROne taking potshots
SNIPERHidden menace.
SNIPERGood shot?
SNIPERAmbush man
SNIPERSneaky marksman
SNIPEROne who works on the roof?
SNIPERLong shot?
SNIPERMarksman with an M40
sniperlong-billed sandpiper
sniperone who snipes (to shoot from a concealed place)
sniperto shoot from a hidden position
sniperto make snide remarks
SNIPERHidden shooter
SNIPERHidden assailant
SNIPERSWAT specialist
SNIPERSight user
SNIPERSWAT team member
SNIPERSharpshooter in a tree
SNIPERSWAT team member on a roof
SNIPERHard-to-see shooter
SNIPERPotshot taker
SNIPERSWAT team marksman
SNIPERHidden sharpshooter
SNIPERConcealed shooter
SNIPERInveterate critic
SNIPERHidden marksman
SNIPERAssassin, perhaps
SNIPERSharpshooter.
SNIPERHidden rifleman.
SNIPERMarksman.