The most common and most likely answer to this crossword clue is the 5 letter word LIMEY
L
I
M
E
Y
More clues leading to the result LIMEY
Buddy explains!

The straight part
We know that "double defn?/fruity" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case double defn?/fruity = limey.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 LIMEY mean?
LIMEY noun- An Englishman or other Briton, or a person of British descent.
- Resembling limes (the fruit); lime-like.
- Of, or pertaining to, limes (the fruit).