Some came round to give a hand – honestly (2,4,2)

I believe the answer is:

so help me

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

'some came round to' is the wordplay.
'came round' means one lot of letters goes inside another.
'to' becomes 'help' (I can't justify this - if you can you should believe this answer much more).
'some' going around 'help' is 'SO HELP ME'.

'give' is the link.

Can you help me to learn more?

(Another definition for so help me that I've seen is " On my word".)

I've seen this clue in the Evening Standard.

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