Vocalist's autobiographical sketch after concert's likely to be good (9)
I believe the answer is:
promising
'be good' is the definition.
(thesaurus)
'vocalist's autobiographical sketch after concert's likely' is the wordplay.
I cannot quite understand how this works, but
'concert' could be 'prom' (abbreviation for promenade concert) and 'prom' is found within the answer.
This explanation may well be incorrect...
'to' is the link.
Can you help me to learn more?
(Other definitions for promising that I've seen before include "Favourable -- hopeful" , "Encouraging" , "Giving one's word" , "Showing great potential" .)