Body fat (4)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
flab
'body fat' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for flab that I've seen before include "Excess fat (colloq.)" , "Loose body fat" , "Ugly, surplus flesh" , "Soft loose flesh" , "spare tyre?" .)