Willingly again to face the daily grind (7)
I believe the answer is:
readily
'willingly' is the definition.
(I've seen this before)
'again to face the daily grind' is the wordplay.
'again' becomes 're' (prefix meaning 'again').
'to face' is a charade indicator (letters next to each other).
'grind' indicates anagramming the letters (I've seen 'grinding' mean this (letters must be ground into a new form)).
'daily' with letters rearranged gives 'adily'.
're'+'adily'='READILY'
(Other definitions for readily that I've seen before include "Willingly, without reluctance" , "Without hesitation" , "With pleasure" , "Willingly, quickly" , "Promptly; willingly" .)