Raven flew round Lawrence (old soldier) (7)
I believe the answer is:
veteran
'old soldier' is the definition.
(veteran can mean a former soldier)
'raven flew round lawrence' is the wordplay.
'flew' indicates anagramming the letters (I've seen 'flying' mean this (letters fly around into new positions)).
'round' indicates putting letters inside.
'lawrence' becomes 'TE' (initials of TE Lawrence aka Lawrence of Arabia).
'raven' is an anagram of 'veran'.
'veran' placed around 'te' is 'VETERAN'.
(Other definitions for veteran that I've seen before include "Ex-member of the armed forces" , "Describing cars built before 1919, especially before 1905" , "Person with long experience, as in American army" , "Person with long experience like old soldier" , "American ex-soldier or old hand" .)