Term for mountainous area with lake and wood (6)
I believe the answer is:
alpine
'term for mountainous' is the definition.
('alpine' means relating to the Alps)
'area with lake and wood' is the wordplay.
'area' becomes 'a' (maths abbreviation).
'with' is a charade indicator (letters next to each other).
'lake' becomes 'L' (geographical abbreviation).
'and' says to put letters next to each other.
'wood' becomes 'pine' (pine is a kind of wood).
'a'+'l'+'pine'='ALPINE'
(Other definitions for alpine that I've seen before include "To do with great European mountains" , "Plant of high mountains" , "Native growing up in mountainous area" , "from Germany, Austria etc" , "Nepali (anag.)" .)