What some piecrusts are (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
graham
(Other definitions for graham that I've seen before include "--- Hill, 60s motor-racing champion" , "Alexander - Bell, Scottish-born inventor" , "Alexander -- Bell, US inventor" , "town in South Africa takes the > biscuits" , "Land" .)