The most common and most likely answer to this crossword clue is the 7 letter word REGALED
R
E
G
A
L
E
D
Buddy explains!

The straight part
We know that "Feasted" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case feasted = regaled.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 REGALED mean?
REGALED verb- To please or entertain (someone).
- To provide hospitality for (someone); to supply with abundant food and drink.
- To feast (on, with something).
- To entertain with something that delights; to gratify; to refresh.