Is a play regularly seen in Cheltenham? (3)

I believe the answer is:

spa

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'in cheltenham?' is the definition.
The definition suggests a singular noun which matches the answer.

'is a play regularly' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'is'+'a'+'play'='isaplay'
The alternate letters of 'isaplay' are 'SPA'.

'seen' is the link.

Can you help me to learn more?

(Other definitions for spa that I've seen before include "eg Vichy" , "Hydromassage facility" , "Bath, possibly" , "where health benefits are offered" , "A therapeutic hot spring" .)

I've seen this clue in The Times.

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