Crossword Genius

Do they provide the dimensions you need at all costs? (9,8)

Ross

I believe the answer is:

desperate measures

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

'costs?' is the definition.
Although both the answer and definition are plural nouns, I cannot see how they can define each other.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

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