On cue, fairy might become confrontational (2-4-4)
I believe the answer is:
in-your-face
'confrontational' is the definition.
(I've seen this in another clue)
'on cue fairy might' is the wordplay.
'on cue fairy' anagrams to 'IN-YOUR-FACE'.
Though, I'm not sure how the anagram is indicated.
'become' is the link.
Can you help me to learn more?
(Other definitions for in-your-face that I've seen before include "Blatantly aggressive" , "Impossible to ignore or avoid" , "Blatantly provocative" .)