Like protozoans, extremely unusual in college wine store (11)

I believe the answer is:

unicellular

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'like protozoans extremely unusual in college wine store' is the definition.
I can't tell whether this definition defines the answer.

'extremely unusual in college wine store' is the wordplay.
'extremely' suggests removing the centre (only the extremes of the word are used).
'in' indicates putting letters inside.
'college' becomes 'uni' (short for university).
'wine store' becomes 'cellar' (I've seen this before).
'unusual' with its middle taken out is 'ul'.
'uni'+'cellar'='unicellar'
'ul' put inside 'unicellar' is 'UNICELLULAR'.

Can you help me to learn more?

(Another definition for unicellular that I've seen is " Simple".)

I've seen this clue in The Times.

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