It contracts to continue one's circulation (7)
I believe the answer is:
systole
'circulation' is the definition.
The answer and definition can be both related to natural events as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'it contracts to continue one's' is the wordplay.
I cannot really see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found within the answer.
'one' could be 'sole' (synonyms) and 'sole' is located in the remaining letters.
This explanation may well be incorrect...
Can you help me to learn more?
I've seen this clue in The Globe and Mail.
Want a hint initially instead of a full solution?
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