Unfortunately bald, I improvised (2-3)
I believe the answer is:
ad-lib
'improvised' is the definition.
(I've seen this before)
'unfortunately bald i' is the wordplay.
'unfortunately' indicates an anagram (a bad or unfortunate spelling).
'bald'+'i'='baldi'
'baldi' is an anagram of 'AD-LIB'.
(Other definitions for ad-lib that I've seen before include "Speak impromptu" , "freely" , "Talk without notes" , "Depart from the text" , "Improvised remark" .)