Son thus goes into country, returning for flowers (8)
I believe the answer is:
narcissi
'flowers' is the definition.
(I've seen this before)
'son thus goes into country returning' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'thus' becomes 'sic' (synonyms).
'goes into' is an insertion indicator.
'country' becomes 'Iran' (Iran is an example).
'returning' shows that the letters should be reversed in order.
's'+'sic'='ssic'
'ssic' going within 'iran' is 'issicran'.
'issicran' back-to-front is 'NARCISSI'.
'for' is the link.
(Other definitions for narcissi that I've seen before include "Scan iris for other flowers, oddly" , "Two-toned daffodils" , "Plants of a genus which includes daffodils" , "Flowers related to the daffodil" , "Scan iris for the spring flowers" .)