Behind a ship (3)

I believe the answer is:

ass

'behind' is the definition.
('ass' can be a synonym of 'behind')

'a ship' is the wordplay.
'ship' becomes 'ss'.
'a'+'ss'='ASS'

(Other definitions for ass that I've seen before include "Quadruped; fool" , "Horse hybrid" , "Pompous fool or beast of burden" , "Dipstick" , "Turkey" .)

I've seen this clue in The Independent.

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