Gets to a point to cross rolling river (7)
I believe the answer is:
arrives
'gets' is the definition.
('arrive' can be a synonym of 'get')
'a point to cross rolling river' is the wordplay.
'point' becomes 's' (S is an example).
'to cross' means one lot of letters goes inside another.
'rolling' indicates an anagram.
'a'+'s'='as'
'river' is an anagram of 'rrive'.
'as' enclosing 'rrive' is 'ARRIVES'.
'to' is the link.
(Other definitions for arrives that I've seen before include "Reaches destination" , "Comes" .)