So, on some days, it turns one's thoughts to washing (4)
I believe the answer is:
soda
'it turns one's thoughts to washing' is the definition.
The definition suggests a singular noun which matches the answer.
'so on some days' is the wordplay.
'on' is a charade indicator (letters next to each other).
'some' becomes 'a' ().
'days' becomes 'd' (abbreviation for days).
'a' after 'd' is 'da'.
'so'+'da'='SODA'
Can you help me to learn more?
(Other definitions for soda that I've seen before include "In the US, a sweet fizzy drink" , "Fizzy water, goes well with whiskey" , ""Splashed" drinks mixer" , "fizz" , "Fizzy drink - chemical compound" .)