GROK Custom Pattern help. Drop leading and trailing spaces

Looking to GROK the following data
What I am after is "SOME STUFF". When I use the following
\(DATA: (?<DATA> *(.+?) *)\)
I get this result in the debugger
but if my data looks like this "(DATA: SOME STUFF )"
I get this result { "DATA": "SOME STUFF " } with trailing spaces. Basically I DO NOT want the leading or trailing spaces around SOME STUFF. How can I drop these?

Use mutate+gsub to remove them.

mutate { gsub => [ "DATA", "^\s+", "", "DATA", "\s+$", "" ] }

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