A problem for Easter? (6)

I believe the answer is:

teaser

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

'a problem' is the definition.
(I know that teaser is a type of problem)

'easter?' is the wordplay.
'easter' can be anagrammed to 'TEASER'.
But, I am unsure how this is indicated.

'for' acts as a link.

Can you help me to learn more?

(Other definitions for teaser that I've seen before include "Tricky question; intriguing preliminary advert" , "Riddle" , "Difficult question" , "Hard question" , "Introduction to arouse curiosity" .)

I've seen this clue in the Evening Standard.

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