Crossword Genius

Contend it's something you see on a ship (4)

Ross

I believe the answer is:

spar

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

'contend' is the definition.
(I know that spar is a kind of contend)

I can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for spar that I've seen before include "Box for practice" , "Mineral; plane's wing beam" , "Box - girder" , "possibly rigged" , "Round pole to support sail" .)

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