Yes, LEAVINGS is a Scrabble word!

Letter values in Scrabble US: L 1, E 1, A 1, V 4, I 1, N 1, G 2, S 1.

Is it a valid word?

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

go away from a place
go and leave behind, either intentionally or by neglect or forgetfulness
act or be so as to become in a specified state
leave unchanged or undisturbed or refrain from taking
move out of or depart from
make a possibility or provide opportunity for; permit to be attainable or cause to remain
have as a result or residue
remove oneself from an association with or participation in
put into the care or protection of someone
leave or give by will after one's death
have left or have as a remainder
be survived by after one's death
transmit (knowledge or skills)
leave behind unintentionally

Also: going away, go forth, go away, leave alone, leave behind, go out, get out, allow for, pull up stakes, pass on.