Equip with programming language, fleet of warships (6)
I believe the answer is:
armada
'fleet of warships' is the definition.
(I've seen this before)
'equip with programming language' is the wordplay.
'equip' becomes 'arm' (I've seen this before).
'with' says to put letters next to each other.
'programming language' becomes 'ada' (I've seen this before).
'arm'+'ada'='ARMADA'
(Other definitions for armada that I've seen before include "Many ships" , "1588 sea battle" , "Large Spanish fleet" , "Spanish war fleet" , "Large war fleet" .)