Crossword Genius

A ship is a form of transport (3)

Ross

I believe the answer is:

ass

I'm a little stuck... Click here to teach me more about this clue!

'form of transport' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'a ship' is the wordplay.
'ship' becomes 'SS' (prefix in ship names eg SS Great Britain).
'a'+'ss'='ASS'

'is a' is the link.

Can you help me to learn more?

(Other definitions for ass that I've seen before include "Pompous person" , "Charlie" , "jack" , "Buffoon" , "A donkey or an idiot" .)

I've seen this clue in The Globe and Mail.
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