Lawful for example inside, all wrong outside (5)
I believe the answer is:
legal
'lawful' is the definition.
(similar in meaning)
'for example inside all wrong outside' is the wordplay.
'for example' becomes 'e.g.' (short for 'exempli gratia', 'for example' in Latin).
'inside' indicates the central letters.
'wrong' becomes 'al' (I can't explain this - if you can you should believe this answer much more).
'outside' indicates putting letters inside (some letters go outside others).
The middle letter of 'all' is 'l'.
'l'+'al'='lal'
'eg' going inside 'lal' is 'LEGAL'.
Can you help me to learn more?
(Other definitions for legal that I've seen before include "Permitted by law" , "OK as an immigrant?" , "Observing acts" , "Within bounds of law" , "In accordance with statute" .)