Answer: shadowbox

AnswerCrossword Clue
SHADOWBOX

Practice punching

SHADOWBOX

Recessed photo frame

SHADOWBOX

Fight the imaginary?

SHADOWBOX
Fight a phantom
SHADOWBOX
Train for a fight
SHADOWBOXRecessed frame
SHADOWBOXPugilist's workout
SHADOWBOXPrepare for the ring
SHADOWBOXTrain, in a way
SHADOWBOXTrain for a bout
SHADOWBOXTrain, in the ring
SHADOWBOXKnickknack display case
SHADOWBOXBe evasive
SHADOWBOXSpar
SHADOWBOXSpar with nobody
SHADOWBOXTrain for the ring
SHADOWBOXTrain by oneself
SHADOWBOXGet punchy?
SHADOWBOXPractice for a title bout
SHADOWBOXPrepare for a bout
SHADOWBOXSpar alone
SHADOWBOXDisplay case of sorts
SHADOWBOXSpar without a partner
SHADOWBOXSmall display case
SHADOWBOXPunch the air