Armada has no time for escape (4)
I believe the answer is:
flee
'for escape' is the definition.
(I've seen this before)
'armada has no time' is the wordplay.
'armada' becomes 'fleet' (fleet of ships).
'has no' indicates named letters should be taken away.
'time' becomes 't' (abbreviation).
'fleet' with 't' removed is 'FLEE'.
(Other definitions for flee that I've seen before include "Abscond" , "Take flight" , "Cut and run" , "rush" , "Take to one's heels" .)