### Clue: Mole, say, is involved with criminal triad (7)
### Answer: DIARIST 
 ### Explanation: Definition: Mole, say
 IS **contained in**(involved with) **anagram of**(criminal) TRIAD.
Defn: An example of which;say, is Adrian Mole, the fictional protagonist whose diaries are the basis of stories by Sue Townsend.