Hey! Ad break periodically censored some stars (5)
I believe the answer is:
hydra
'censored some stars' is the definition.
'hydra' can be an answer for 'stars' (I've seen this before). I am not sure about the 'censored some' bit.
'hey ad break periodically' is the wordplay.
'periodically' means one should take alternating letters (letters must be selected 'every so often').
'hey'+'ad'+'break'='heyadbreak'
The alternate letters of 'heyadbreak' are 'HYDRA'.
Can you help me to learn more?
(Other definitions for hydra that I've seen before include "Multi-headed monster slain by Hercules" , "Small red-berried tree" , "Nine-headed monster of Greek myth" , "Mythical nine-headed monster" , "Many-headed snake slain by Hercules" .)