Enter lab for training that's available for hire (8)

I believe the answer is:

rentable

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

'that's available for hire' is the definition.
I can't judge whether this defines the answer.

'enter lab for training' is the wordplay.
'for training' is an anagram indicator ('train' can mean to shape the growth of a plant).
'enter'+'lab'='enterlab'
'enterlab' anagrammed gives 'RENTABLE'.

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I've seen this clue in The Guardian.

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