Ensure heat distribution is in order (3,4)

I believe the answer is:

see that

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'ensure' is the definition.
(thesaurus)

'heat distribution is in order' is the wordplay.
I cannot really understand how this works, but
an anagram of 'heat' is 'etha' which is present in the answer.
The remaining letters 'set' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Daily Express.

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