Glenda, excited after tango, involved (7)
I believe the answer is:
tangled
'involved' is the definition.
(I know that involved can be written as tangled)
'glenda excited after tango' is the wordplay.
'excited' is an anagram indicator.
'after' means one lot of letters go next to another.
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'glenda' with letters rearranged gives 'angled'.
'angled' after 't' is 'TANGLED'.
(Other definitions for tangled that I've seen before include "Confusedly twisted" , "Confusedly matted" , "Convoluted" , "Entwined" , "Knotted" .)