Answer: slacken

AnswerCrossword Clue
SLACKEN

Slow down

SLACKEN

Loosen up

SLACKEN

Become looser

SLACKEN
Let up
SLACKEN
Lose tension
SLACKENSlow up.
SLACKENLet up.
SLACKENEase off.
SLACKENSlow down.
SLACKENGrow limp.
SLACKENRelax
SLACKENAbate
SLACKENLose tautness
SLACKENEase up, as a downpour
SLACKENSubside