Unbalanced (8)
There are a few possibilities for this:
lopsided
'unbalanced' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for top-heavy that I've seen before include "(Of company) having too many executives" , "With upper part too weighty" , "Unstable through an excess of weight" , "Unstable through being over-loaded at the higher end" , "Unbalanced" .)
'unbalanced' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for lopsided that I've seen before include "Askew, awry" , "Crooked" , "Not symmetrical" , "With one part lower or heavier than the other" , "Leaning over, askew" .)