Fixing this bangle is complicated (12)

I believe the answer is:

establishing

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'fixing' is the definition.
The definition and answer can be both to do with contact as well as being present participle verbs.
Maybe there's a link between them I don't understand?

'this bangle is complicated' is the wordplay.
'complicated' is an anagram indicator (a complex or confusing ordering of the letters).
'this'+'bangle'+'is'='thisbangleis'
'thisbangleis' is an anagram of 'ESTABLISHING'.

Can you help me to learn more?

(Another definition for establishing that I've seen is " Founding".)

I've seen this clue in The Globe and Mail.

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