Wryly incongruous (6)
I believe the answer is:
ironic
(Other definitions for ironic that I've seen before include "Describes a statement that says the opposite of what is clearly the case" , "Using the opposite of the truth for humorous effect" , "Type of situation where one is mocked by fate" , "W. Country port, its Channel" , "Sarcastic, expressing meaning by invoking opposite" .)