Tin containing damsons primarily in very small country (6)
I believe the answer is:
sweden
'country' is the definition.
(country in Europe)
'tin containing damsons primarily in very small' is the wordplay.
'tin' becomes 'Sn' (Sn is the chemical symbol for tin).
'containing' indicates putting letters inside.
'primarily' says to take the initial letters.
'in' indicates putting letters inside.
'very small' becomes 'wee' ('wee' is a Scottish word for small).
The initial letter of 'damsons' is 'd'.
'd' inserted into 'wee' is 'wede'.
'sn' going around 'wede' is 'SWEDEN'.
(Other definitions for sweden that I've seen before include "4's neighbour" , "We send to Scandinavian country" , "Member country of the European Union" , "Stockholm is the capital" , "Stockholm's country" .)