Tour made terrible by our singer (10)
I believe the answer is:
troubadour
'singer' is the definition.
(troubadour is a kind of singer)
'tour made terrible by our' is the wordplay.
'made' indicates an anagram.
'terrible' becomes 'bad' (similar in meaning).
'by' says to put letters next to each other.
'tour' anagrammed gives 'trou'.
'trou'+'bad'+'our'='TROUBADOUR'
(Other definitions for troubadour that I've seen before include "Minstrel" , "love poet" , "Mediaeval singer-poet" , "composer of lyrics" , "Poet-singer" .)