Related Clues:

• Mushroom sandwiches no good — that makes us cross
• Cross when mushroom's no good inside
• Dog of no clear breed
• Cross among religious houses
• Hybrid lemon developed outside Greece
• Dope the dog
• Dog, especially in US slang originally, a mongrel
• Pooch severing leg from meat
• Break norm, e.g. on length, unlike well-bred setter, say
• Among relics therein lies a cross
• Cross Frenchman working with Greek upset the French
• Labradoodle, e.g
• Setter perhaps tense with stomach turning
• Mickey's Pluto, officially
• One of those with flawed pedigree starts to measure up to talent