Answer: tinder

AnswerCrossword Clue
TINDERContents of a risky box
tinderany dry substance that ignites easily
tinderdry inflammable matter
TINDERPopular dating app
TINDERIt goes up fast
TINDERDry twigs, e.g.
TINDERCombustible substance
TINDERTwigs, perhaps
TINDERInflammatory stuff
TINDERFast starter
TINDERHighly flammable wood
TINDERFlammable item
TINDERFlammable material
TINDERKind of box
TINDERCombustible material
TINDERFire-starting stuff
TINDERSubstance akin to kindling.
TINDERFlint's companion.
TINDERFlammable material.
TINDERCompanion of flint and steel.
TINDERInflammable material.
TINDERTouchwood.
TINDERDry twigs for a fire
TINDERKindling
TINDERFire starter
TINDERFire-start
TINDERKindling's kin
TINDERIt's highly flammable
TINDERFirewood