Remove cover as expert shows (5)
I believe the answer is:
erase
'remove' is the definition.
(thesaurus)
'cover as expert shows' is the wordplay.
'shows' says the answer is hidden in the clue.
'ERASE' is hidden in the letters of 'cover as expert'.
(Other definitions for erase that I've seen before include "Remove permanently" , "Destroy recording on audio or video tape" , "Remove recorded material" , "score" , "Rub out, expunge" .)