Record of visit suppressing an ugly rumour (6)
I believe the answer is:
canard
'ugly rumour' is the definition.
(I've seen this before)
'record of visit suppressing an' is the wordplay.
'record of visit' becomes 'card' (I can't explain this - if you can you should give a lot more credence to this answer).
'suppressing' is an insertion indicator.
'card' enclosing 'an' is 'CANARD'.
Can you help me to learn more?
(Other definitions for canard that I've seen before include "A false rumour, originally French" , "Deliberately misleading fabrication" , "A French kind of false rumour" , "A false rumour from France? (6)" , "Baseless rumour" .)