Microphone capturing a gag -- absolutely magnificent! (8)
I believe the answer is:
majestic
'magnificent' is the definition.
(thesaurus)
'microphone capturing a gag absolutely' is the wordplay.
'microphone' becomes 'mic'.
'capturing' means one lot of letters goes inside another.
'gag absolutely' becomes 'jest' (synonyms. I am not sure about the 'absolutely' bit.).
'a'+'jest'='ajest'
'mic' going around 'ajest' is 'MAJESTIC'.
Can you help me to learn more?
(Other definitions for majestic that I've seen before include "Stately, dignified or grand" , "Grand, impressive" , "Regal - grand" , "Splendid, regal" , "Regal, imperial" .)