Charlie, installed in a post, gets rise (6)
I believe the answer is:
ascend
'rise' is the definition.
(I know that rise can be written as ascend)
'charlie installed in a post' is the wordplay.
'charlie' becomes 'c' (phonetic alphabet: alpha, bravo, charlie etc.).
'installed in' indicates putting letters inside.
'post' becomes 'send' (synonyms).
'a'+'send'='asend'
'c' placed inside 'asend' is 'ASCEND'.
'gets' is the link.
(Other definitions for ascend that I've seen before include "Make the top" , "Scale" , "Climb, rise" , "Gain altitude" , "Move upwards" .)