Just a rough description (6)
I believe the answer is:
uneven
'rough description' is the definition.
'uneven' can be an answer for 'rough' (I've seen this before). I am unsure of the 'description' bit.
'just a' is the wordplay.
I cannot quite understand how this works, but
'just' could be 'even' and 'even' is found within the answer.
The remaining letters 'un' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for uneven that I've seen before include "Odd - rough" , "Rough and irregular" , "Patchy" , "That's odd" , "Rough, jagged" .)