It can lark about these days with little advantage (6,9)

I believe the answer is:

carnal knowledge

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

'it' is the definition.
(both are euphemisms for sex)

'can lark about these days with little advantage' is the wordplay.
'about' is an anagram indicator.
'these days with' becomes 'nowl' (I can't explain this - if you can you should give a lot more credence to this answer).
'little advantage' becomes 'edge' (I've seen this in another clue).
'can'+'lark'='canlark'
'canlark' with letters rearranged gives 'carnalk'.
'carnalk'+'nowl'+'edge'='CARNAL KNOWLEDGE'

Can you help me to learn more?

(Another definition for carnal knowledge that I've seen is " It".)

I've seen this clue in The Sunday Times and The 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.