Threw parties, organising a guard for doors and windows (7,5)

I believe the answer is:

weather strip

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'a guard for doors and windows' is the definition.
I can't tell whether this defines the answer.

'threw parties organising' is the wordplay.
'organising' indicates an anagram.
'threw'+'parties'='threwparties'
'threwparties' anagrammed gives 'WEATHER STRIP'.

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I've seen this clue in The Times.

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