A claw in the front, a long one, too (5)
I believe the answer is:
talon
'a claw' is the definition.
(I know that claw can be written as talon)
'in the front a long one too' is the wordplay.
'in' indicates a hidden word.
'TALON' can be found hidden inside 'front a long too'.
(Other definitions for talon that I've seen before include "Hooker" , "The stock" , "Eagle claw" , "Bird of prey's claw" , "Sharp hooked claw" .)