Austrians spent this start of September relaxing (9)

I believe the answer is:

schilling

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'austrians spent this' is the definition.
The definition suggests a singular noun which matches the answer.

'start of september relaxing' is the wordplay.
'start of' says to take the initial letters.
'relaxing' becomes 'chilling' (I've seen this before).
The first letter of 'september' is 's'.
's'+'chilling'='SCHILLING'

Can you help me to learn more?

(Other definitions for schilling that I've seen before include "Money not around any more!" , "Formerly the basic unit of money in Austria" , "Old Viennese piece" , "Old Austrian currency" .)

I've seen this clue in The Times.

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