Polish rival his nan upset (4,7)
'polish' is the definition.
Both the answer and definition are adjectives.
Perhaps they are linked in a way I don't understand?
'rival his nan upset' is the wordplay.
'upset' indicates anagramming the letters.
'rival'+'his'+'nan'='rivalhisnan'
'rivalhisnan' anagrammed gives 'NAILVARNISH'.
Can you help me to learn more?
'polish' is the definition.
'rival his nan upset' is the wordplay.
'upset' indicates an anagram.
'rival'+'his'+'nan'='rivalhisnan'
'rivalhisnan' anagrammed gives 'NAIL-VARNISH'.
(Other definitions for nail varnish that I've seen before include "Lacquer at one's fingertips" , "digital enhancement" , "Substance applied to finger ends" , "Manicurist's cosmetic lacquer" , "Lacquer applied to the body's extremities" .)