The most common and most likely answer to this crossword clue is the 5 letter word MOPED
M
O
P
E
D
More clues leading to the result MOPED
Buddy explains!

The straight part
We know that "Scooter/was blue" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case scooter/was blue = moped.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 MOPED mean?
MOPED verb- To carry oneself in a depressed, lackadaisical manner; to give oneself up to low spirits; to pout, sulk.
- To make spiritless and stupid.
- Melancholic, dejected.
- A lightweight, two-wheeled vehicle equipped with a small motor and pedals, designed to go no faster than some specified speed limit.