Long article about His Excellency (4)
I believe the answer is:
ache
'long' is the definition.
(to long for something is to ache for it)
'article about his excellency' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'about' becomes 'c' (abbreviation for circa).
'his excellency' becomes 'he'.
'a'+'c'+'he'='ACHE'
(Other definitions for ache that I've seen before include "anguish" , "Dull throbbing pain" , "A dull lingering pain" , "agony" , "Suffer dull pain" .)