Subcontinental adder seen in unexpected hot spell (6,6)
I believe the answer is:
indian summer
'in unexpected hot spell' is the definition.
The answer and definition can be both related to time as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'subcontinental adder' is the wordplay.
'subcontinental' becomes 'indian' (I've seen this before).
'adder' becomes 'summer' (I've seen this before).
'indian'+'summer'='INDIAN SUMMER'
'seen' is the link.
Can you help me to learn more?
(Other definitions for indian summer that I've seen before include "Welcome warmth" , "Fine autumn" , "Late heatwave" , "Unexpectedly warm period late in the year" , "Warm autumnal weather" .)