Starry-eyed, Marconi dancing tango inside (8)
I believe the answer is:
romantic
'starry-eyed' is the definition.
(thesaurus)
'marconi dancing tango inside' is the wordplay.
'dancing' indicates an anagram.
'tango' becomes 't' (phonetic alphabet: alpha, bravo, charlie etc.).
'inside' means one lot of letters goes inside another.
'marconi' is an anagram of 'romanic'.
'romanic' placed around 't' is 'ROMANTIC'.
(Other definitions for romantic that I've seen before include "Amorous, showing loving feeling" , "Imaginative or amorous" , "Such a novel deals with love" , "Literary period in early 19th century" , "Soulful or amorous idealist" .)