Happy Easter. Solve the clues and mix them around to find the clue that leads to the master puzzle Crossword

Detectives can't do their job without me. Often overlooked
I'm able to contain anything.
Until this happens I am nobody. Thanks, Nan!
It's a dog's life in a childrens book. see me run?
illegal substance and life can both cause it. Hello?
Very fetching! The alien follows the nickname of a famous cricket ground
It sits on my head and cuts its own head off.
Vikings of old buried their gold. Apostrophe not included
thanks to radar, lidar, sonar and gps we can always be this w... send out a search party? No need.
Howzaat? Umpire? Negative!
You have a new Title, Chef Sensei
What else do we call Him? First have some Tea.
A no-named computer and phone industry
Not Now, Not in the Future, In the end, chop the head off Never.
Oh boy, it's a cold one! Thank goodness or my ice cream would melt