AL added to first word of a phrase yields a different one GOOD ONES: Mail carrier's romantic activities?
POSTAL-DATING Collage of potpourri bits?
PETAL-PROJECT It's a lock
YALE [manufacturer] You can get down from them
EIDERS Numbers that aren't programmed
ENCORES Page with some right angles?
OPED [conservative opinions] BTW:
Peg must be in love with Al because along with the theme words there are five other AL's hidden in this puzzle. (Or she's a big American League baseball fan.) She could've had another AL if at 66-Across she used OPAL. MON = Monday or " ___ Oncle"; APA = Am. Psychiatric Assn.; RAV = sporty car "___-4."
SALSA [it's more a sauce than a condiment --- I'd go with "tomato sauce"]
Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun