They occur in a wide assortment (5)

I believe the answer is:

ideas

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

'they occur' is the definition.
The definition suggests an adverb but the answer is not.

'in a wide assortment' is the wordplay.
'in' says the answer is hidden in the clue.
'IDEAS' is hidden in the letters of 'wide assortment'.

Can you help me to learn more?

(Other definitions for ideas that I've seen before include "Thoughts, maybe creative" , "Thoughts or opinions" , "Thoughts, concepts" , "Thoughts, personal views" , "Thoughts from Sadie" .)

I've seen this clue in the Evening Standard.

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