The most common and most likely answer to this crossword clue is the 5 letter word PEAVY
P
E
A
V
Y
Buddy explains!
The straight part
We know that "It helps to shift log" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it helps to shift log = peavy.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 PEAVY mean?
PEAVY noun- A tool used to manipulate logs, having a thick wooden handle, a steel point, and a curved hooked arm. Similar to a cant-hook, but shorter and stouter, and with a pointed end.