Gave nothing to men at sea? Hurry up! (3,1,4,2)
I believe the answer is:
get a move on
'hurry up' is the definition.
(I've seen this before)
'gave nothing to men at sea?' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'at sea?' is an anagram indicator (I've seen 'at sea' mean this).
'gave'+'o'+'to'+'men'='gaveotomen'
'gaveotomen' is an anagram of 'GET A MOVE ON'.
(Other definitions for get a move on that I've seen before include "Hurry up (colloq.)" , "shift" , "quickly!" , "Speed up" .)