Snakes have time for crow (5)
I believe the answer is:
boast
'for crow' is the definition.
(I've seen this before)
'snakes have time' is the wordplay.
'snakes' becomes 'boas' (boa is a kind of snake).
'have' says to put letters next to each other.
'time' becomes 't' (abbreviation).
'boas'+'t'='BOAST'
(Other definitions for boast that I've seen before include "Talk conceitedly" , "Show off" , "Crow, brag" , "Talk big" , "Talk with self-pride" .)