A river? Skill needed to secure a landing-point (6)
I believe the answer is:
ararat
'landing-point' is the definition.
(where Noah's Ark landed)
'a river? skill needed to secure a' is the wordplay.
'river?' becomes 'r' (abbreviation for river).
'skill' becomes 'art' (both can mean a talent).
'needed' says to put letters next to each other.
'to secure' is an insertion indicator (inserted letters are secured inside).
'r'+'art'='rart'
'rart' going around 'a' is 'rarat'.
'a'+'rarat'='ARARAT'
(Other definitions for ararat that I've seen before include "Rowing blades" , "Mount on which Noah's Ark is said to have landed" , "Noah's ark mountain" , "Turkey's highest mountain" , "Turkish Mount said to contain Noah's Ark" .)