Always established in a high place (7)
I believe the answer is:
everest
'high place' is the definition.
(I've seen this in another clue)
'always established' is the wordplay.
'always' becomes 'ever' (synonyms).
'established' becomes 'est' (abbreviation).
'ever'+'est'='EVEREST'
'in a' is the link.
(Other definitions for everest that I've seen before include "One conquered in 1953" , "The highest mountain of all (7)" , "Where Hillary was" , "A high spot" , "Highest Himalayan mountain" .)