The most common and most likely answer to this crossword clue is the 4 plus 3 letter word PINE TAR
P
I
N
E
T
A
R
More clues leading to the result PINE TAR
Buddy explains!
The straight part
We know that "It may be blended for painter" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it may be blended for painter = pine tar.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.