Yes, SPELLED is a Scrabble word!

Letter values in Scrabble US: S 1, P 3, E 1, L 1, L 1, E 1, D 2.

Is it a valid word?

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

orally recite the letters of or give the spelling of
indicate or signify
write or name the letters that comprise the conventionally accepted form of (a word or part of a word)
relieve (someone) from work by taking a turn
place under a spell
take turns working

Also: spell out.