He boasted about being caught in fog and arrived too late (6,3,4)

I believe the answer is:

missed the boat

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'arrived too late' is the definition.
I know nothing about this answer so I can't judge whether this works.

'he boasted about being caught in fog' is the wordplay.
'about' is an anagram indicator.
'being caught in' is an insertion indicator.
'fog' becomes 'mist' (mist is a kind of fog**).
'he'+'boasted'='heboasted'
'heboasted' with letters rearranged gives 'sedtheboa'.
'sedtheboa' placed into 'mist' is 'MISSED THE BOAT'.

'and' acts as a link.

Can you help me to learn more?

(Another definition for missed the boat that I've seen is " Lost an opportunity".)

I've seen this clue in The Guardian.

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