Cryptic clue 2 spoilers!

Assuming you just want the reward.. I'll edit this post and include what the solutions are for each day.
Yeah I'm a nerd for these kinds of things xD

Day 1: Talk to Roddeck with 3 cooked pike, 2 buckets and 10 feathers.
Day 2: Talk to Lowe with two strung gold ammys, 5 leather boots, and 8 balls of wool
Day 3: Talk to Megan with 6 fire runes and 3 bones
Day 4: Talk to the hairdresser with 3 planks, 4 earth runes, and 7 iron daggers
Day 5: Talk to the Reneal (chick that sells plateskirts in al kaharid) with 2 Uncut Rubies, 6 bronze maces, and 4 fire runes
Final Step: Talk to the Duke of Lumbridge with 2 pike, 6 Earth runes and 1 bronze mace

Reward is the investigator outfit

NOTE: When the event dissapears, so will this topic

perfect for me:P

Thanks for the guide =) Would've spent hours on it otherwise lol