The term 'TINIEST COMPLAINT' can be broken down into two words, 'TINIEST' and 'COMPLAINT'. The word 'TINIEST' is defined as the smallest or least amount of something, while 'COMPLAINT' is defined as an expression of dissatisfaction or annoyance. The crossword solution for this term is 'PEEP', which is a short, high-pitched sound made by a bird or other small animal. This sound is often used to express surprise, fear, or joy. In conclusion, the term 'TINIEST COMPLAINT' can be interpreted as a small expression of dissatisfaction or annoyance, such as a PEEP.