Lengthening of syllable in English many favour overturning (8)
I believe the answer is:
diastole
'lengthening of syllable in english many favour overturning' is the definition.
The definition and answer can be both related to natural events as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'english many favour overturning' is the wordplay.
'english' becomes 'e' (abbreviation).
'many' becomes 'lots' (lots of something).
'favour' becomes 'aid' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'overturning' says the letters should be written in reverse.
'e'+'lots'+'aid'='elotsaid'
'elotsaid' in reverse letter order is 'DIASTOLE'.
Can you help me to learn more?
(Another definition for diastole that I've seen is " bit of a heart-throb".)