Supplies rushed on board (6)
I believe the answer is:
stores
'supplies' is the definition.
(I've seen this in another clue)
'rushed on board' is the wordplay.
'rushed' becomes 'tore' (to tear around is to rush or run fast).
'on' means one lot of letters goes inside another.
'board' becomes 'ss' (I've seen this in other clues).
'tore' placed into 'ss' is 'STORES'.
(Other definitions for stores that I've seen before include "Large retail establishments" , "Establishments for retail sales" , "Puts away for a tosser" , "Accumulates, saves up" , "Puts aside for future use" .)