The most common and most likely answer to this crossword clue is the 7 letter word HEE-HAW
H
E
E
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H
A
W
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The straight part
We know that "Donkey’s call" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case donkey’s call = hee-haw.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 HEE-HAW mean?
HEE-HAW noun- The cry of an ass or donkey.
- Nothing.
- To utter the cry of an ass or donkey.
- The cry of an ass or donkey.