The most common and most likely answer to this crossword clue is the 9 letter word PATRIOTIC
I've seen this crossword clue in The Guardian
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More clues leading to the result PATRIOTIC
- Flag-waving threesome in pact I suspect
- Nationalist
- Liking country film about a threesome, titillating initially
- Flag-waving threesome in pact, I fancy
- Country-loving group second to get cut off following father
- Loyal Irishman’s nervous reaction, imbibing port
- Loyal and ready insurgence with endless murder
- Loyal Irishman in charge restricting disorder
- Threesome in Pennsylvania city briefly returned flying the flag
- Loyal father to scamper about one in charge
Buddy explains!

The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does PATRIOTIC mean?
PATRIOTIC adjective- Inspired by or showing patriotism; done out of love of one's country; zealously and unselfishly devoted to the service of one's country