Crossword Genius

Slog, hike (4)

Ross

I believe the answer is:

trek

I believe this is a double definition.

'slog' is the first definition.
(I've seen this before)

'hike' is the second definition.
(trekking is a kind of hiking)

(Other definitions for trek that I've seen before include "Long difficult walk" , "Difficult journey on foot" , "Tramp" , "Extended journey" , "A long arduous walk" .)

I've seen this clue in The Telegraph.
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