Fine Charlie, say, for raising lizard (5)
I believe the answer is:
gecko
'lizard' is the definition.
(I know that gecko is a type of lizard)
'fine charlie say for raising' is the wordplay.
'fine' becomes 'ok' (synonyms).
'charlie' becomes 'c' (phonetic alphabet: alpha, bravo, charlie etc.).
'say' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'for raising' is a reversal indicator (in a down clue, letters go up).
'ok'+'c'+'eg'='okceg'
'okceg' back-to-front is 'GECKO'.
(Other definitions for gecko that I've seen before include "Cold-blooded type" , "Small lizard with adhesive foot-pads" , "Wall Street character" , "Small tropical lizard" , "Lizard than can't blink" .)