Set about conclusion for fanciful tale (6)
I believe the answer is:
legend
'fanciful tale' is the definition.
'legend' can be an answer for 'tale' (I've seen this before). I am not sure about the 'fanciful' bit.
'set about conclusion' is the wordplay.
'set' becomes 'gel' (both can mean to harden).
'about' says the letters should be written in reverse.
'conclusion' becomes 'end' (something's conclusion is its end).
'gel' in reverse letter order is 'leg'.
'leg'+'end'='LEGEND'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for legend that I've seen before include "Old yarn" , "Very famous member's death" , "Superstar" , "Caption; very well known" , "Tale of heroism" .)