Treks are arranged for dashing fellow with nothing on? (8)
I believe the answer is:
streaker
'dashing fellow with nothing on?' is the definition.
I can't tell whether this definition defines the answer.
'treks are arranged' is the wordplay.
'arranged' indicates an anagram (letters rearranged).
'treks'+'are'='treksare'
'treksare' with letters rearranged gives 'STREAKER'.
'for' is the link.
Can you help me to learn more?
(Other definitions for streaker that I've seen before include "Exhibitionist spectator" , "A naughtily nude runner (8)." , "he barely covers the distance" , "Rat reeks (anag.)" , "One running naked" .)