When vampires sleep in Florida yard (3)
I believe the answer is:
day
'when vampires sleep' is the definition.
(I've seen this in another clue)
'in florida yard' is the wordplay.
'in' indicates a hidden word.
'DAY' can be found hidden inside 'florida yard'.
(Other definitions for day that I've seen before include "Period of time" , "Doris -, US actress" , "Twenty-four hours" , "24 hours" , "24 23 acrosses" .)