Is patronising with the pilot one's helping to land? (5,4)

I believe the answer is:

talks down

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'is patronising' is the definition.
I can't tell whether this definition defines the answer.

'with the pilot one's helping to land?' is the wordplay.
'with' is a charade indicator (letters next to each other).
'the pilot one's helping' becomes 'talks' (I can't explain this - if you can you should give a lot more credence to this answer).
'to land?' becomes 'down' (synonyms).
'talks' put next to 'down' is 'TALKS DOWN'.

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I've seen this clue in the Evening Standard.

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