Low station (4)
I believe the answer is:
base
This clue is a double definition.
'low' is the first definition.
(synonyms)
'station' is the second definition.
(synonyms)
(Other definitions for base that I've seen before include "Found - worthless" , "Mean; HQ" , "Not a noble" , "Ignoble; low part" , "Bottom support" .)