Times creates puzzle that's rather dry (5,3)

I believe the answer is:

extra sec

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'rather dry' is the definition.
I don't know anything about this answer so I cannot judge whether this works.

'times creates puzzle' is the wordplay.
'times' becomes 'x' (2 times 4 is 2 x 4).
'puzzle' indicates anagramming the letters.
'x'+'creates'='xcreates'
'xcreates' anagrammed gives 'EXTRA SEC'.

'that's' acts as a link.

Can you help me to learn more?

I've seen this clue in The Guardian.

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