### Clue: Conclusions of study group put into storage in the end — much later than 26 (7)
### Answer: YPSILON 
 ### Explanation: Definition: much later than 26
or upsilon, the 20th letter in the Greek alphabet (THETA is 8th.) The conclusions of [stud]Y [grou]P, plus SILO="put into storage", plus the end of [i]N