Dine before travel showing moral conscience (8)
I believe the answer is:
superego
'moral conscience' is the definition.
'superego' can be an answer for 'conscience' (superego is a kind of conscience). I am unsure of the 'moral' bit.
'dine before travel' is the wordplay.
'dine' becomes 'sup' (synonyms).
'before' becomes 'ere' (poetic term for 'before').
'travel' becomes 'go' (synonyms).
'sup'+'ere'+'go'='SUPEREGO'
'showing' acts as a link.
Can you help me to learn more?
(Other definitions for superego that I've seen before include "Part of the unconscious mind - pose urge (anag)" , "makes one feel guilty" , "Internal monitor of psyche" , "Part of mind acting as conscience" , "Freudian concept of conscience" .)