Before end of parade, medals far too heavy (5)
I believe the answer is:
obese
'far too heavy' is the definition.
(obese means overweight)
'before end of parade medals' is the wordplay.
'before' says to put letters next to each other.
'end of' suggests the final letters.
'medals' becomes 'OBEs' (Order of the British Empire awards).
The final letter of 'parade' is 'e'.
'e' after 'obes' is 'OBESE'.
(Other definitions for obese that I've seen before include "Grossly overweight" , "Extremely portly" , "Too chubby" , "Significantly overweight" , "Morbidly overweight" .)