The most common and most likely answer to this crossword clue is the 7 letter word DOTTIER
I've seen this crossword clue in The Times
D
O
T
T
I
E
R
More clues leading to the result DOTTIER
- Party time — couple runs for more nuts
- Tone row about start of toccata featuring more staccato notes ...
- Performer admits drinking nothing, one becoming more crazy
- How Fiji is crazier than Pitcairn?
- Party time! Couple runs for more nuts
- More bananas showing a higher number of speckles
- More eccentric cat loses heart after a period
- Sillier period preceding row
- Organiser welcoming teetotaller with drink at Centre is weirder
- More eccentric, as Sheila is to Gemma according to Morse
Buddy explains!

The straight part
We know that "more crazy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case more crazy = dottier.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does DOTTIER mean?
DOTTIER adjective- Mildly insane or eccentric; often, senile.
- Having an unsteady gait.
- Having many dots.