Possible Clues:

• Most of old fur is just about acceptable
• Nancy's not dark — fair
• Barely adequate ... or what the starts of 17-, 26-, 37- and 50-Across are
• Father’s dark brown — or fair?
• Clear for traversal
• Reasonably OK, as a slow car may be?
• Basel spa complex is good enough
• Fair exams should be!
• Barely adequate sailor in lapses at sea
• OK