No geranium in arrangement? Charming! (10)

I believe the answer is:

enamouring

'charming' is the definition.
('enamour' can be a synonym of 'charm')

'no geranium in arrangement?' is the wordplay.
'in arrangement?' indicates anagramming the letters (I've seen 'in arrangement' mean this (I've seen this in other clues)).
'no'+'geranium'='nogeranium'
'nogeranium' with letters rearranged gives 'ENAMOURING'.

I've seen this clue in The Everyman puzzle in The Observer.

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.