Enchanting area within reach across river (8)
I believe the answer is:
adorable
'enchanting' is the definition.
(both can mean lovable)
'area within reach across river' is the wordplay.
'area' becomes 'a' (maths abbreviation).
'within reach' becomes 'doable' (I've seen this in another clue).
'across' means one lot of letters goes inside another.
'river' becomes 'r' (abbreviation for river).
'doable' placed around 'r' is 'dorable'.
'a'+'dorable'='ADORABLE'
(Other definitions for adorable that I've seen before include "Lovely and attractive" , "sweet" , "worthy of love" , "Cute and cuddly?" , "winning" .)