It's OK to ring after a call for help (4)

I believe the answer is:

soso

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'it's ok' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'ring after a call for help' is the wordplay.
'ring' becomes 'o' (letter resembling a ring).
'after' means one lot of letters go next to another.
'a call for help' becomes 'sos' (I've seen this in another clue).
'o' after 'sos' is 'SOSO'.

'to' acts as a link.

Can you help me to learn more?

(Other definitions for soso that I've seen before include "mediocre" , "Indifferent" .)

I've seen this clue in The Irish Independent.

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