Yes, PLUCK is a Scrabble word!

Letter values in Scrabble US: P 3, L 1, U 1, C 3, K 5.

Is it a valid word?

PLUCK is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

the trait of showing courage and determination in spite of possible loss or injury
the act of pulling and releasing a taut cord

pull or pull out sharply
sell something to or obtain something from by energetic and especially underhanded activity
rip off; ask an unreasonable price
pull lightly but sharply with a plucking motion
strip of feathers
look for and gather

PLUCK was the Wordle answer on Dec. 21, 2021 (#185). Stuck on today’s? Use the Wordle helper.

Also: pull off, pick off.

Not playable in Scrabble US: DEPLUMATE.