Awful porkies are told, dismissing old reform agenda (11)
I believe the answer is:
perestroika
'reform agenda' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'awful porkies are told dismissing old' is the wordplay.
'awful' is an anagram indicator.
'dismissing' indicates named letters should be taken away.
'porkies'+'are'+'told'='porkiesaretold'
'porkiesaretold' with 'old' removed is 'porkiesaret'.
'porkiesaret' with letters rearranged gives 'PERESTROIKA'.
Can you help me to learn more?
(Other definitions for perestroika that I've seen before include "Gorbachev's reform policy" , "Gorbachov's policy" , "1980s Soviet economic policy" , "Reform of the Soviet political and economic system in the 1980s" , "Reform policy (in Soviet Union)" .)