Country, say, troika visited regularly (5)
I believe the answer is:
syria
'country' is the definition.
(Syria is an example)
'say troika visited regularly' is the wordplay.
'visited regularly' indicates alternate letters.
'say'+'troika'='saytroika'
The alternate letters of 'saytroika' are 'SYRIA'.
(Other definitions for syria that I've seen before include "Middle East republic" , "Land" , "Good judgement, knowledge" , "Country bordering?Lebanon" , "Country E. of Lebanon" .)