Record to have when going across mountains (4)
I believe the answer is:
alps
'mountains' is the definition.
(European mountain range)
'record to have when going across' is the wordplay.
I cannot quite understand how this works, but
'record' could be 'lp' (LP is an example) and 'lp' is found in the answer.
'when' could be 'as' and 'as' is found within the leftover letters.
No letters remain.
This may be the basis of clue (or it may be nonsense).
(Other definitions for alps that I've seen before include "high areas" , "Peaks" , "Eur. mountain range" , "Mountains in Central Europe" , "Laps around mountains" .)