What seasonally encourages a romantic understanding? (9)
I believe the answer is:
mistletoe
'understanding?' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for mistletoe that I've seen before include "Kissed-under plant" , "it may get you a few smackers" , "Christmas berry" , "Parasitic shrub for Christmas" , "incitement to lovers?" .)