Lowest point in Florida now recalled (5)
I believe the answer is:
nadir
'lowest point' is the definition.
(I've seen this in another clue)
'in florida now recalled' is the wordplay.
'in' indicates the answer is hidden within the clue.
'recalled' says the letters should be written in reverse (to recall can mean to bring something back).
'ridan' is hidden in the letters of 'florida now'.
'ridan' written backwards gives 'NADIR'.
(Other definitions for nadir that I've seen before include "Lower one cannot get!" , "Low point" , "You can't sink lower!" , "Low spot" , "Drain (anag)" .)