Related Clues:

• May be good-natured, but sure to be cross
• Cross is metre longer, roughly
• Mixed in among relevant matter
• Many get longer to get upset and cross
• Crosspiece found among reliquaries
• Westminster reject
• Tramp, e.g., in 'Lady and the Tramp'
• One comes from among relatively unrefined types
• Non-pedigree
• Cross-breed dog
• Dog of no recognisable breed
• It's no good tucking into mushroom of unknown variety
• In among relatives, can't be sure which are his?
• No good slicing mushroom with mixed stock
• Mushroom sandwiches no good — that makes us cross