One from Arabia, I will follow the old people (6)
I believe the answer is:
yemeni
'one from arabia' is the definition.
(I've seen this before)
'i will follow the old people' is the wordplay.
'will follow' says to put letters next to each other.
'the old' becomes 'ye'.
'people' becomes 'men' (men can refer to humanity as a whole).
'ye'+'men'='yemen'
'i' put after 'yemen' is 'YEMENI'.
(Other definitions for yemeni that I've seen before include "Native of a country on the Arabian Peninsula" , "Person from Aden perhaps" , "Relating to a republic on the Arabian Peninsula" , "from the Middle East" , "Someone from Aden?" .)