Yes, RECUSING is a Scrabble word!

Letter values in Scrabble US: R 1, E 1, C 3, U 1, S 1, I 1, N 1, G 2.

Is it a valid word?

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

disqualify oneself (as a judge) in a particular case
challenge or except to a judge as being incompetent or interested, in canon and civil law