Prison term in Turkey, say (4)
I believe the answer is:
bird
I believe this is a double definition.
'prison term' is the first definition.
(bird can mean time served in prison)
'turkey say' is the second definition.
(turkey is a kind of bird)
'in' acts as a link.
(Other definitions for bird that I've seen before include "Egg-laying vertebrate" , "porridge" , "Creature - time in prison" , "Egg-laying creature" , "Nest builder?" .)