The most common and most likely answer to this crossword clue is the 4 plus 5 letter word TREE TRUNK
T
R
E
E
T
R
U
N
K
More clues leading to the result TREE TRUNK
Buddy explains!
The straight part
We know that "What may be logged" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what may be logged = tree trunk.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.