Touch on soap’s conclusion being inspired by Dynasty – that is entertaining (7)
I believe the answer is:
impinge
'touch' is the definition.
(thesaurus)
'soap's conclusion being inspired by dynasty that is entertaining' is the wordplay.
'conclusion' indicates one should take the final letters.
'being inspired by' indicates putting letters inside (some letters breathed in or 'inspired' by others).
'dynasty' becomes 'ming' (Chinese dynasty).
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'entertaining' means one lot of letters goes inside another.
The last letter of 'soap' is 'p'.
'p' placed within 'ming' is 'mping'.
'mping' going within 'ie' is 'IMPINGE'.
'on' is the link.
(Other definitions for impinge that I've seen before include "Have a (negative) effect (on)" , "Strike - make an impression (on)" , "Make an impact, encroach" , "Trespass (upon)" , "Encroach - strike" .)