Crossword Genius

Completely fashionable dog taken to Oz? (2,4)

Ross

I believe the answer is:

in toto

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

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

'fashionable dog taken to oz?' is the wordplay.
I cannot quite see how this works, but
'fashionable' could be 'in' (in can mean fashionable or trendy) and 'in' is found within the answer.
'dog' could be 'toto' (I've seen this before) and 'toto' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for in toto that I've seen before include "Completely - entirely (Latin)" , "overall" , "In entirety" , "Altogether, completely" , "Tranquillity" .)

I've seen this clue in The Telegraph.
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