Crossword Genius

Measures not intended to be taken seriously? (5,5)

Ross

I believe the answer is:

light verse

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

'not intended to be taken seriously?' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'measures' is the wordplay.
I cannot quite see how this works, but
'measures' could be 'rs' (R is an example) and 'rs' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

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