A speculative kick? (4)
I believe the answer is:
punt
'kick?' is the definition.
(punt is a kind of kick)
I don't understand how the rest of the clue works.
(Other definitions for punt that I've seen before include "What the Irish used" , "Pre-euro currency unit of Ireland" , "Flat-bottomed poled boat" , "Open flat-bottomed boat" , "gambling" .)