Acid test: Ireland shuffled mess around (9)

I believe the answer is:

philander

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

'mess around' is the definition.
(thesaurus)

'acid test ireland shuffled' is the wordplay.
'acid test' becomes 'ph' (I can't justify this - if you can you should believe this answer much more).
'shuffled' indicates anagramming the letters.
'ireland' with letters rearranged gives 'ilander'.
'ph'+'ilander'='PHILANDER'

Can you help me to learn more?

(Other definitions for philander that I've seen before include "Womanise" , "Play around" , "Flirt, chase women" , "Have an affair" , "Womanize" .)

I've seen this clue in 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.