Lowest point in Florida now receding (5)
I believe the answer is:
nadir
'lowest point' is the definition.
(I've seen this before)
'in florida now receding' is the wordplay.
'in' indicates the answer is hidden within the clue.
'receding' shows that the letters should be reversed in order.
'ridan' is hidden in the letters of 'florida now'.
'ridan' back-to-front is 'NADIR'.
(Other definitions for nadir that I've seen before include "Given lowest place" , "Point of greatest despair" , "Low spot" , "Lower one cannot get!" , "Very bottom, farthest from zenith" .)