Revolutionary Communist Party following dictator’s first move uncertainly (6)
I believe the answer is:
dodder
'move uncertainly' is the definition.
'revolutionary communist party following dictator's first' is the wordplay.
'revolutionary' says the letters should be written in reverse.
'communist' becomes 'red' (red is a kind of communist).
'party' becomes 'do' (do is a kind of party**).
'following' means one lot of letters go next to another.
'first' says to take the initial letters.
The initial letter of 'dictators' is 'd'.
'red'+'do'='reddo'
'reddo' in reverse letter order is 'odder'.
'odder' after 'd' is 'DODDER'.
(Other definitions for dodder that I've seen before include "move unsteadily" , "Hesitate" , "Be decrepit in the Dublin river" , "Tremble from age" , "Walk unsteadily along the Dublin river?" .)