Answer: ebbing

AnswerCrossword Clue
EBBING

Heading toward empty

EBBING

Winding down

EBBING

Fading slowly

EBBING
Flowing back
EBBING
Falling back
EBBINGGoing out to sea
EBBINGSubsiding
EBBINGBackward flow
EBBINGRefluent
EBBINGDe-intensifying
EBBINGReceding.
EBBINGRecessive.
EBBINGRunning out.
EBBINGSubsiding.
EBBINGWaning
EBBINGIn decline
EBBINGOn the way out
EBBINGGoing out, as the tide
EBBINGDeclining in power
EBBINGSadly, Big Ben is on the decline (6)
EBBINGGoing out
EBBINGReceding
EBBINGOn the wane
EBBINGFalling off