S-t-r-e-t-c-h? (5)

I believe the answer is:

spell

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

'h?' is the definition.
(I know that spell is a more specific form of the action alternate)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for spell that I've seen before include "get letters in order" , "term" , "Magic formula - period of time" , "Write letters correctly" , "Name letters of a word" .)

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

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