22 across
Weapons
and
fruit
onboard
(6)
Weapons and fruit onboard (6)
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The definition is at the beginning of the clue.
How the clue works
So Weapons gives us SPEARS — think spears, javelins, that sort of thing. The cunning bit is that PEAR, the fruit, is tucked inside SS (Steam Ship, hence 'onboard'), giving you S-PEAR-S.