Slovak nearly fluffed volley (5)
I believe the answer is:
salvo
'volley' is the definition.
(I know that volley can be written as salvo)
'slovak nearly fluffed' is the wordplay.
'nearly' means to remove the last letter.
'fluffed' indicates anagramming the letters.
'slovak' with its final letter taken away is 'slova'.
'slova' anagrammed gives 'SALVO'.
(Other definitions for salvo that I've seen before include "Simultaneous burst of fire" , "Discharge of gunfire" , "What comes across" , "Round of fire" , "Simultaneous discharge of weapons" .)