Fare dodgers pull off hiding in ship (9)
I believe the answer is:
stowaways
'fare dodgers pull off hiding in ship' is the definition.
I can't judge whether this defines the answer.
'fare dodgers pull off hiding in' is the wordplay.
'fare dodgers' becomes 'ss' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'pull' becomes 'tow' (tow is a kind of pull).
'off' becomes 'away' (synonyms).
'hiding in' indicates putting letters inside.
'tow'+'away'='towaway'
'ss' going around 'towaway' is 'STOWAWAYS'.
Can you help me to learn more?
(Another definition for stowaways that I've seen is " The hide aboard to get free passage".)