### Clue: Average, struggling Inter Milan twice letting in a sitter? (15)
### Answer: PARLIAMENTARIAN 
 ### Explanation: Definition: sitter
 PAR(an average/a normal or usual amount/a standard) + **anagram of**(struggling) INTER MILAN **containing**(… letting in) **2 x**(twice …) A.
Defn: … in the House of Commons or Lords.