Hide in Oxford (4,7)

I believe the answer is:

shoe leather

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

'hide in oxford' is the definition.
The answer and definition can be both substances as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'hide in oxford' is the wordplay.
I cannot really understand how this works, but
'hide' could be 'leather' (an animal hide) and 'leather' is found within the answer.
'oxford' could be 'shoe' (I've seen this in another clue) and 'shoe' is present in the answer.
No letters remain.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for shoe leather that I've seen before include "Footwear material" , "material in Oxford" .)

I've seen this clue in the Evening Standard.

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