Domestic returns and dons tailored suit (8)
I believe the answer is:
diamonds
'suit' is the definition.
(I've seen this before)
'domestic returns and dons tailored' is the wordplay.
'domestic' becomes 'maid' (maid is a kind of domestic).
'returns' shows that the letters should be reversed in order.
'and' is a charade indicator (letters next to each other).
'tailored' indicates anagramming the letters (the letters are customised ).
'maid' in reverse letter order is 'diam'.
'dons' anagrammed gives 'onds'.
'diam'+'onds'='DIAMONDS'
(Other definitions for diamonds that I've seen before include "Red cards" , "Suit of cards" , "Precious gemstones" , "Precious stones found amid nods" , "where some Americans find sporting action" .)