A spectacular display of equestrianism (5)

I believe the answer is:

rodeo

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

'equestrianism' is the definition.
(I know that rodeo is a type of equestrian sport)

'a spectacular display of' is the wordplay.
'a spectacular display' becomes 'rode' (I can't justify this - if you can you should give a lot more credence to this answer).
'of' becomes 'o''.
'rode'+'o'='RODEO'

Can you help me to learn more?

(Other definitions for rodeo that I've seen before include "stock venue?" , "Drive in Beverly Hills" , "Originally, a round up of cattle" , "sort of exhibition" , "Exhibition of cowboy skills" .)

I've seen this clue in The Globe and Mail.

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