The most common and most likely answer to this crossword clue is the 4 plus 1 plus 4 letter word GIVE A HOOT
I've seen this crossword clue in The Guardian
G
I
V
E
A
H
O
O
T
More clues leading to the result GIVE A HOOT
Buddy explains!
The straight part
We know that "Care" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case care = give a hoot.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.