Teaser Of The Day No. 21

[Carl]

I am a set of three words, all with the same four letters.
First I am a type of carriage.
Then switch my middle letters, and I am a cover often useful on a diamond.
Now switch my end letters ...
When you see me, you also see hair.

What are the words ?


Answers will be provided next Thursday evening after 21:00.

[Carl]

ANSWERS

trap = a light one-horse carriage
tarp = a canvas cover, one use is to protect a baseball diamond from rain
part = the line that divides hair, as when combing