Korean currency's up twofold? Steady on! (3,3)
I believe the answer is:
now now
'on' is the definition.
Both the definition and answer are adverbs. Maybe there's an association between them I don't understand?
'korean currency's up twofold? steady' is the wordplay.
'korean currency' becomes 'won' (I've seen this in another clue).
'up' says the letters should be written backwards (in down clue: letters go upwards).
'twofold? steady' becomes 'now' (I can't justify this - if you can you should give a lot more credence to this answer).
'won' back-to-front is 'now'.
'now'+'now'='NOW NOW'
Can you help me to learn more?
(Other definitions for now now that I've seen before include "It's said to reprimand or pacify a person" , "Warning" , "stop bickering" , "said to calm one down" .)