The last part aggravates risks (9)

I believe the answer is:

endangers

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'risks' is the definition.
(I've seen this before)

'the last part aggravates' is the wordplay.
'the last part' becomes 'end' (I've seen this in another clue).
'aggravates' becomes 'angers' (I can't justify this - if you can you should give a lot more credence to this answer).
'end'+'angers'='ENDANGERS'

Can you help me to learn more?

(Other definitions for endangers that I've seen before include "poses a threat" , "Puts in peril" , "Imperils" , "Risks" , "Places in peril" .)

I've seen this clue in The Daily Express.

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