The term 'not up to snuff' is an idiom that means something is not satisfactory or of a good enough quality. The crossword solutions for this term are SUBPAR (6 letters), SHODDY (6 letters), UNFIT (5 letters), INADEQUATE (10 letters), POOR (4 letters), ILL (3 letters), OFF (3 letters), WEAK (4 letters), UNABLE (6 letters), and UNDERTHEWEATHER (15 letters). All of these words can be used to describe something that is not up to the expected standard.