I have no idea what he was trying to imply. I think he was just throwing out a lot of questions at her to trip her up. He asked the same things over and over to see if her answers would remain the same. I think she did pretty well, and stood her ground.
If they are, they should have brought that out during Prosecution.
Notice they never have tried to link any particular clothing to the crime, except for the jacket.
From what I understand, this is not the same jacket that Glennie just mentioned as him wearing while at Dad's.