Some open-air guides climbing like Magyars (6)

'like magyars' is the definition.
(of or relating to Turanian people such as Magyars)

'some open-air guides climbing' is the wordplay.
'some' says the answer is hidden in the clue (some of the parts of the word are used).
'climbing' says the letters should be written in reverse (in a down clue, letters climb up).
'nairgu' is hidden in the letters of 'open air guides'.
'nairgu' in reverse letter order is 'UGRIAN'.