The most common and most likely answer to this crossword clue is the 8 letter word PLAUDITS
I've seen this crossword clue in The Guardian
P
L
A
U
D
I
T
S
More clues leading to the result PLAUDITS
Buddy explains!
The straight part
We know that "Handy expressions of approval" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case handy expressions of approval = plaudits.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 PLAUDITS mean?
PLAUDITS noun- (often in the plural) A mark or expression of applause; praise bestowed.