To woo (5)
I believe the answer is:
court
'to woo' is the definition.
('court' can be a synonym of 'woo')
This is all the clue.
(Other definitions for court that I've seen before include "Tennis playing area" , "Woo - where tennis is played" , "Woo; tribunal" , "Attempt to gain" , "Pay suit to, woo" .)