House plant fanatic Oliver is unusual (7,6)

I believe the answer is:

african violet

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'house plant' is the definition.
'African violet' can be an answer for 'plant' (African violet is an example). I'm not sure about the 'house' bit.

'fanatic oliver is unusual' is the wordplay.
'is unusual' indicates anagramming the letters.
'fanatic'+'oliver'='fanaticoliver'
'fanaticoliver' with letters rearranged gives 'AFRICAN VIOLET'.

Can you help me to learn more?

(Other definitions for african violet that I've seen before include "House plant with hairy leaves" , "Common house plant" , "Indoor flowering plant" , "Inactive flora (anag) - popular pot plant" , "Popular house plant" .)

I've seen this clue in The Telegraph.

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