Tell story about nobleman (7)
I believe the answer is:
recount
'tell story' is the definition.
(I've seen this before)
'about nobleman' is the wordplay.
'about' becomes 're' (common abbreviation for 'with reference to').
'nobleman' becomes 'count' (count is a kind of nobleman).
're'+'count'='RECOUNT'
(Other definitions for recount that I've seen before include "Communicate" , "outcome of tight ballot?" , "post-election procedure?" , "Check numbers" , "Tell - check on election result" .)