Breeding facility problem is consuming me (7)

I believe the answer is:

wormery

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'breeding facility' is the definition.
The definition suggests a singular noun which matches the answer.

'problem is consuming me' is the wordplay.
'problem' becomes 'worry' (I am not sure about this - if you are sure you should believe this answer much more).
'is consuming' means one lot of letters goes inside another.
'worry' placed around 'me' is 'WORMERY'.

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I've seen this clue in The Times.

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