Most importantly, Alan suppresses bad smell linked with meat (5,3)
I believe the answer is:
above all
'most importantly' is the definition.
(synonyms)
'alan suppresses bad smell linked with meat' is the wordplay.
I cannot quite see how this works, but
'smell' could be 'bo' (abbreviation for Body Odour) and 'bo' is found in the answer.
'meat' could be 'veal' (veal is a kind of meat) and 'veal' is found within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for above all that I've seen before include "primarily" , "Hamlet : 'This . . . . . . . ., to thine own self be true'" , "Most importantly" , "First and foremost" , "Shakespeare: 'This . . . . . . . ., to thine own self be true'" .)