A Liberal frequently high (5)
I believe the answer is:
aloft
'high' is the definition.
(I've seen this in another clue)
'a liberal frequently' is the wordplay.
'liberal' becomes 'l' (abbreviation).
'frequently' becomes 'oft' (oft can mean frequently, eg oft-quoted).
'a'+'l'+'oft'='ALOFT'
(Other definitions for aloft that I've seen before include "Animistic cult" , "Heading for heaven" , "At a considerable height" , "To great height" , "flying?" .)