Most important net sales I falsified (9)

I believe the answer is:

essential

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'most important' is the definition.
'essential' can be an answer for 'important' (similar in meaning). I'm not sure about the 'most' bit.

'net sales i falsified' is the wordplay.
'falsified' indicates an anagram.
'net'+'sales'+'i'='netsalesi'
'netsalesi' is an anagram of 'ESSENTIAL'.

Can you help me to learn more?

(Other definitions for essential that I've seen before include "Key" , "something necessary" , "Indispensible" , "Crucial" , "Indispensable, necessary" .)

I've seen this clue in The Everyman puzzle in The Observer.

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