Answer: jammed

AnswerCrossword Clue
JAMMEDBlocked, as radio broadcasts
jammedpeople or objects jammed together
jammedto make unworkable
jammedto become stuck or unworkable
jammedto interfere with (radio signals), making them unintelligible
jammedJAM, to force together tightly
jammedto push into a space
jammeddifficult situation
JAMMEDClogged
JAMMEDImprovised on guitar
JAMMEDObstructed
JAMMEDImprovised, in a way
JAMMEDStuck, as a coin
JAMMEDLike rush-hour buses
JAMMEDFouled up.
JAMMEDInterfered with, in radio.
JAMMEDChock-full
JAMMEDPlayed without arrangements
JAMMEDPlayed with an impromptu gathering of musicians
JAMMEDPressed tightly together
JAMMEDFilled to capacity