Answer: let

AnswerCrossword Clue
LETHindrance
LETCourt do-over
LETReplayed point
LETSuffer
LETTennis replay
LETNet-nicking serve
LETServe that doesn't count
LETSay it's OK
LETSay it's okay
LETDo-over serve
LETEnable
LETVoided serve
LETDiminutive suffix
LETTake lodgings
LETDropped service?
LETCharter
LETSanction
LETAllow to
LETPermit to
LET"... a hundred flowers bloom...": Mao Zedong
letto rent out
LETTennis term
LETCourt call
LETHire out
LETLease
LETPig tail?
LETRented
LETThe Beatles' ".... It Be"
LETWimbledon call
LET.. down (disappoint)
LETTennis do-over
LETAllow
LETWimbledon do-over
LETLeased
LETPermit
LETTennis call
LETThe Beatles' ".. It Be"
LETVoided tennis play
LETRent out
LETGive permission to