The most common and most likely answer to this crossword clue is the 5 letter word BIDDY
B
I
D
D
Y
Buddy explains!
The straight part
We know that "fowl" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case fowl = biddy.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 BIDDY mean?
BIDDY noun- A woman, especially an old woman; especially one regarded as fussy or mean or a gossipy busybody.
- An attractive girl.
- An Irish maidservant.
- (by extension) An Irishwoman.
- A name used in calling a hen or chicken, often as "biddy-biddy-biddy".
- (often in the plural) bitch, girl, woman, especially one that is promiscuous