Cricket ball teen smashed finds extra cover? (8,7)

I believe the answer is:

electric blanket

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'cover?' is the definition.
(I know that electric blanket is a type of cover)

'cricket ball teen smashed' is the wordplay.
'smashed' is an anagram indicator.
'cricket'+'ball'+'teen'='cricketballteen'
'cricketballteen' with letters rearranged gives 'ELECTRIC BLANKET'.

'finds extra' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for electric blanket that I've seen before include "Bed heater" , "cover at night" , "this might warm you up" , "Bed warmer" , "Provider of extra bed heat" .)

I've seen this clue in The Independent.

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