Answer: smilin

AnswerCrossword Clue
SMILIN"... Jack" (old comic strip)
SMILINOld aviation comic strip ".. Jack"
SMILIN"... Jack" (Zack Mosley comic strip)
SMILIN"... Jack" (comic strip)
SMILINZack Mosley's comic strip "..... Jack"
SMILINZack Mosley's comic strip "... Jack"