Oddball daring callers to go on dates naked (8,5)

I believe the answer is:

calendar girls

I'm a little stuck... Click here to teach me more about this clue!

'dates naked' is the definition.
I don't know anything about this answer so I can't judge whether this works.

'oddball daring callers to go on' is the wordplay.
'oddball' indicates anagramming the letters (I've seen this in other clues).
'to go on' is a charade indicator (letters next to each other) (in a down clue, some letters go on top of others).
'daring' after 'callers' is 'callersdaring'.
'callersdaring' is an anagram of 'CALENDAR GIRLS'.

Can you help me to learn more?

(Another definition for calendar girls that I've seen is " Popular film".)

I've seen this clue in The Irish Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.