Shattered yob without energy to conform (4)
I believe the answer is:
obey
'conform' is the definition.
(I know that obey is a more specific form of the action conform)
'shattered yob without energy' is the wordplay.
'shattered' is an anagram indicator.
'without' means one lot of letters goes inside another ('without' can be similar in meaning to 'outside').
'energy' becomes 'e' (physics symbol as in E=mc2).
'yob' with letters rearranged gives 'oby'.
'oby' going around 'e' is 'OBEY'.
'to' acts as a link.
(Other definitions for obey that I've seen before include "Abide by" , "Conform" , "Carry out (a command)" , "Take orders" , "Do as ordered" .)