Balanced son on counter (6)
I believe the answer is:
stable
'balanced' is the definition.
(similar in meaning)
'son on counter' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'on' says to put letters next to each other (in a down clue, letters appear on others).
'counter' becomes 'table' (I've seen this before).
's'+'table'='STABLE'
(Other definitions for stable that I've seen before include "farm building" , "Firmly balanced or fixed" , "container for punch, for instance" , "It might accommodate Arab" , "far from bats?" .)