Light pig meat packed with energy (6)
I believe the answer is:
beacon
'light pig meat' is the definition.
'beacon' can be an answer for 'light' (I've seen this before). I am unsure of the 'pig meat' bit.
'packed with energy' is the wordplay.
'packed' becomes 'beon' (I am not sure about this - if you are sure you should believe this answer much more).
'with' indicates putting letters inside.
'energy' becomes 'AC' (AC is an example).
'beon' going around 'ac' is 'BEACON'.
Can you help me to learn more?
(Other definitions for beacon that I've seen before include "A warning light as on headland" , "Warning light on a high point" , "Shiner" , "Prominent light on a hill" , "Signal fire - signalling buoy" .)