Crossword Genius

Complaint of the motorist using too much petrol? (11)

Ross

I believe the answer is:

consumption

I'm a little stuck... Click here to teach me more about this clue!

This clue might be a double definition.

'complaint of the motorist' is the first definition.
'consumption' can be an answer for 'complaint' (consumption is a kind of health problem). I am unsure of the 'of the motorist' bit.

'using too much petrol?' is the second definition.
'consumption' can be an answer for 'using' (thesaurus). I am unsure of the 'too much petrol?' bit.

Can you help me to learn more?

(Other definitions for consumption that I've seen before include "Tuberculosis" , "See 7" , "that may be conspicuous" , "disorder" , "Eating" .)

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