Inspector again suffers a heart problem (6,8)

I believe the answer is:

angina pectoris

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

'a heart problem' is the definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Perhaps you can see a link between them that I don't see?

'inspector again suffers' is the wordplay.
'suffers' indicates an anagram.
'inspector'+'again'='inspectoragain'
'inspectoragain' with letters rearranged gives 'ANGINA PECTORIS'.

Can you help me to learn more?

I've seen this clue in The Times.

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