Enchanting expression or term (5)

I believe the answer is:

spell

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

This clue might be a double definition.

'enchanting expression' is the first definition.
'spell' can be an answer for 'enchanting' (thesaurus). I'm unsure of the 'expression' bit.

'term' is the second definition.
(I've seen this before)

'or' acts as a link.

Can you help me to learn more?

(Other definitions for spell that I've seen before include "Magical charm; period" , "Formula believed to have magical force" , "Magic formula - period of time" , "get letters in order" , "Write letters correctly" .)

I've seen this clue in the Sydney Morning Herald.

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