The most common and most likely answer to this crossword clue is the 8 letter word PLIMSOLL
P
L
I
M
S
O
L
L
More clues leading to the result PLIMSOLL
- Marine line's pump
- A line of footwear
- Vote to keep unusual slim footwear
- Important shipping line
- Put foot in it with shipping line?
- Line in religious writing by Hardy that’s deleted another line
- Slim poll leads change shipping line
- . Lol! Limps with battered shoe
- Shoe treating limps? LOL!
- Reforming MP, Liberal, I’m second in election
Buddy explains!

The straight part
We know that "Shoe" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case shoe = plimsoll.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 PLIMSOLL mean?
PLIMSOLL noun- A rubber-soled lace-up canvas shoe for sports or onboard ships; a precursor of trainers.
- The plimsoll symbol ⦵ (or o) that is used as a superscript in the notation of thermodynamics to indicate an arbitrarily chosen non-zero reference point.