You are served with chicken up in popular Indian (5)
I believe the answer is:
nehru
'popular indian' is the definition.
(I've seen this before)
'you are served with chicken up' is the wordplay.
'you are' becomes 'ur' (text or internet abbreviation).
'served with' is a charade indicator (letters next to each other).
'chicken' becomes 'hen' (hen is a kind of chicken).
'up' is a reversal indicator (in down clue: letters go upwards).
'ur'+'hen'='urhen'
'urhen' back-to-front is 'NEHRU'.
'in' acts as a link.
(Other definitions for nehru that I've seen before include "Famous Indian" , "Jawaharlal -, first PM of India" , "Indian PM 1947-64" , "Old statesman" , "former statesman" .)