Touring America, club singer one performing incognito? (14)
I believe the answer is:
unrecognisable
'incognito?' is the definition.
(I've seen this before)
'touring america club singer one performing' is the wordplay.
'touring' is an insertion indicator (tour can mean to go around).
'america' becomes 'a' (common abbreviation eg in USA).
'performing' is an anagram indicator (the letters move around or 'perform').
'club'+'singer'+'one'='clubsingerone'
'clubsingerone' anagrammed gives 'unrecognisble'.
'a' going within 'unrecognisble' is 'UNRECOGNISABLE'.
(Another definition for unrecognisable that I've seen is " incognito?".)