It surrounds a revolver and gets blown up (4)

I believe the answer is:

tyre

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

'it surrounds a revolver and gets blown up' is the definition.
The definition suggests a singular noun which matches the answer.

This is the entire clue.

Can you help me to learn more?

(Other definitions for tyre that I've seen before include "Wheel cover, may be tubeless" , "Rubber wheel casing" , "Rubber wheel rim" , "Rubber covering on a wheel" , "Travelling band" .)

I've seen this clue in The Irish Independent.

Want a hint initially instead of a full solution? Install my app