Milky Way cousin MARSBAR [had my head in the stars]
Hair line? PART [not hairline]
Successful way to go? FAR
In again RETRO
Get a wrong number MISADD [not in Webster's Third but it's clever]

SEMANAS
AVEC
NISAN [in Webster's Third]

WAXINGGIBBOUS [wonder how many arts majors knew this word]
DWAN [who knew --- besides his parents]

Creep BOZO [A bozo seems more a fool than a slimeball.]