Pampered politician ultimately blocks satirical piece by editor (5-3)
I believe the answer is:
spoon-fed
'pampered' is the definition.
(I've seen this before)
'politician ultimately blocks satirical piece by editor' is the wordplay.
'ultimately' says to take the final letters.
'blocks' means one lot of letters goes inside another (upper walls off glass inside formal).
'satirical piece' becomes 'spoof' (I've seen this in another clue).
'by' says to put letters next to each other.
'editor' becomes 'ed' (abbreviation).
The final letter of 'politician' is 'n'.
'n' inserted within 'spoof' is 'spoonf'.
'spoonf'+'ed'='SPOON-FED'
(Other definitions for spoon-fed that I've seen before include "Given excessive help, like baby receiving nourishment" , "Feather-bedded" , "Pampered" , "Artificially fostered" , "Cosseted" .)