Novel 1,760-yard hike consuming a couple of days (11)
I believe the answer is:
middlemarch
'novel' is the definition.
(George Eliot novel)
'1760-yard hike consuming a couple of days' is the wordplay.
'1760-yard' becomes 'mile' (a mile is 1760 yards).
'hike' becomes 'march' ('march' can be a synonym of 'hike').
'consuming' is an insertion indicator.
'a couple of' says to double the letters.
'days' becomes 'd'.
'mile'+'march'='milemarch'
'd' doubled is 'dd'.
'milemarch' going around 'dd' is 'MIDDLEMARCH'.
(Other definitions for middlemarch that I've seen before include "George Eliot novel" , "Novel by female author" , "Book by George Eliot" .)