The most common and most likely answer to this crossword clue is the 8 letter word ENTHUSES
I've seen this crossword clue in The Daily Telegraph
E
N
T
H
U
S
E
S
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 ENTHUSES mean?
ENTHUSES verb- To show enthusiasm
- To cause (someone) to feel enthusiasm or to be enthusiastic