Cryptic crossword clue
One wakes you and gets you excited! 7

The most common and most likely answer to this crossword clue is the 7 letter word AROUSER

I've seen this crossword clue in Financial Times
A
R
O
U
S
E
R

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.

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