Wiggling of toe is flirtatious activity (7)

I believe the answer is:

footsie

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

'flirtatious activity' is the definition.
The definition suggests a singular noun which matches the answer.

'wiggling of toe is' is the wordplay.
'wiggling' indicates anagramming the letters (letters wiggle around).
'of'+'toe'+'is'='oftoeis'
'oftoeis' is an anagram of 'FOOTSIE'.

Can you help me to learn more?

(Other definitions for footsie that I've seen before include "concerns folk in the City" , "Amorous behaviour" , "shows city values" , "Act of flirting (under the table?)" , "Popular name for the FTSE index" .)

I've seen this clue in The Sun and The Telegraph.

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.