Crossword puzzle clue "door hidden exit that you could fall through"

___ door (hidden exit that you could fall through)

Hidden exit

Babyface "How could you fall in love ___?"

___ exit (back door)

Exit door

It's like a see-through plastic you could cover anything with... Honestly I might just use it for my next line of tees lol but that'd be fresh

Door opening that you look through to see who's knocking

Could be fine, could be graphic