Chopper's up -- film director coming into London for larks (10)

I believe the answer is:

exaltation

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'for larks' is the definition.
(I've seen this before)

'chopper's up film director coming into london' is the wordplay.
'chopper' becomes 'axe' (something which chops).
'up' is a reversal indicator (in down clue: letters go upwards).
'film director' becomes 'tati' (French filmmaker Jacques Tati).
'coming into' is an insertion indicator.
'london' becomes 'lon' (I am not sure about this - if you are sure you should believe this answer much more).
'axe' backwards is 'exa'.
'tati' going inside 'lon' is 'ltation'.
'exa'+'ltation'='EXALTATION'

Can you help me to learn more?

(Other definitions for exaltation that I've seen before include "delight" , "Larks" , "Extreme happiness" .)

I've seen this clue in The Telegraph.

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