Airbus loo in need of repair, requiring considerable effort (9)

I believe the answer is:

laborious

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'requiring considerable effort' is the definition.
I can't tell whether this defines the answer.

'airbus loo in need of repair' is the wordplay.
'in need of repair' indicates anagramming the letters.
'airbus'+'loo'='airbusloo'
'airbusloo' with letters rearranged gives 'LABORIOUS'.

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(Other definitions for laborious that I've seen before include "pedestrian" , "Gruelling" , "Requiring much time and effort" , "Tedious" , "Using much time and effort" .)

I've seen this clue in The Irish Times.

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