So-called Zoom objective a touchy topic (4,5)

I believe the answer is:

sore point

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

'a touchy topic' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'so-called zoom objective' is the wordplay.
'so-called' indicates a 'sounds like' (homophone) clue.
'zoom' becomes 'soar' (synonyms).
'objective' becomes 'point' (I've seen this in another clue).
'soar' sounds like 'sore'.
'sore'+'point'='SORE POINT'

Can you help me to learn more?

(Other definitions for sore point that I've seen before include "Touchy matter" , "Annoying issue" , "grievance" .)

I've seen this clue in the Sydney Morning Herald.

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