Trendy city where one avoids a complete soaking (3,4)

I believe the answer is:

hip bath

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'where one avoids a complete soaking' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.

'trendy city' is the wordplay.
'trendy' becomes 'hip' (both can mean fashionable).
'city' becomes 'bath' (English city).
'hip'+'bath'='HIP-BATH'

Can you help me to learn more?

(Another definition for hip bath that I've seen is " Washer's facility".)

I've seen this clue in The Times.

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