About to move, not starting liberal club (6)
I believe the answer is:
cudgel
'club' is the definition.
(I know that cudgel is a type of club)
'about to move not starting liberal' is the wordplay.
'about' becomes 'c' (abbreviation for circa).
'to move' becomes 'budge' (to budge is to move slightly).
'not starting' means to remove the first letter.
'liberal' becomes 'l' (abbreviation).
'budge' with its initial letter taken away is 'udge'.
'c'+'udge'+'l'='CUDGEL'
(Other definitions for cudgel that I've seen before include "Heavy staff, club" , "Wooden weapon" , "Short stout stick" , "Heavy staff used as a weapon" , "brain" .)