Tasty April favourite I celebrate (10)

I believe the answer is:

appetising

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

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

'april favourite i celebrate' is the wordplay.
'april' becomes 'ap' (I can't justify this - if you can you should give a lot more credence to this answer).
'favourite' becomes 'pet' (synonyms).
'celebrate' becomes 'sing' (I've seen this before).
'ap'+'pet'+'i'+'sing'='APPETISING'

Can you help me to learn more?

(Other definitions for appetising that I've seen before include "Mouth-watering" , "Tasty" .)

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

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