Mocks date disheartened with fairground attractions (7)
I believe the answer is:
derides
'mocks' is the definition.
(deriding is a kind of mocking)
'date disheartened with fairground attractions' is the wordplay.
'disheartened' says to hollow out the word (remove centre letters) (the middle or heart is removed).
'with' means one lot of letters go next to another.
'fairground attractions' becomes 'rides' (fairground rides).
'date' with its middle taken out is 'de'.
'de'+'rides'='DERIDES'
(Other definitions for derides that I've seen before include "Laughs at" , "Ridicules" , "Mocks, scorns" .)