Tattered blankets covering over old shoes (5,5)

I believe the answer is:

ankle boots

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'tattered blankets' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'covering over old shoes' is the wordplay.
'covering' indicates putting letters inside.
'over old' becomes 'boo' (I can't justify this - if you can you should give a lot more credence to this answer).
'shoes' becomes 'anklets' (anklet is a kind of shoe).
'boo' put within 'anklets' is 'ANKLE BOOTS'.

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