The most common and most likely answer to this crossword clue is the 14 letter word HUNGER‑STRIKER
I've seen this crossword clue in The Guardian
H
U
N
G
E
R
â
€
‘
S
T
R
I
K
E
R
Buddy explains!
The straight part
We know that "One with good cause to be a fare dodger" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one with good cause to be a fare dodger = hunger‑striker.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.