Bombards ship crossing place of turmoil (6)
I believe the answer is:
shells
'bombards' is the definition.
(both can mean to attack or fire at)
'ship crossing place of turmoil' is the wordplay.
'ship' becomes 'SS' (prefix in ship names eg SS Great Britain).
'crossing' indicates putting letters inside.
'place of turmoil' becomes 'hell' (turbulent or distressing location).
'ss' placed around 'hell' is 'SHELLS'.
(Other definitions for shells that I've seen before include "Collect them on the seashore" , "'''She sells sea ... by the sea shore'' (6)'" , "Hard protective structures" , "Carapaces or military missiles" , "Carapaces or large missiles" .)