Walk round English comprehensive mostly exuding calm (8)
I believe the answer is:
peaceful
'calm' is the definition.
(similar in meaning)
'walk round english comprehensive mostly exuding' is the wordplay.
I cannot quite see how this works, but
'english' could be 'e' (abbreviation) and 'e' is located in the answer.
'walk' could be 'pace' (pacing is a kind of walking) and 'pace' is found in the remaining letters.
The remaining letters 'ful' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for peaceful that I've seen before include "Not disturbed by strife or war" , "Not violent" , "Amicable" , "Serene" , "Quiet" .)