Yes, RECUSAL is a Scrabble word!

Letter values in Scrabble US: R 1, E 1, C 3, U 1, S 1, A 1, L 1.

Is it a valid word?

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

(law) the disqualification of a judge or jury by reason of prejudice or conflict of interest; a judge can be recused by objections of either party or judges can disqualify themselves

Not playable in Scrabble US: RECUSATION.