Glenda, excited after tango, gets 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' indicates anagramming the letters.
'after' says to put letters next to each other.
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'glenda' anagrammed gives 'angled'.
'angled' after 't' is 'TANGLED'.
'gets' acts as a link.
(Other definitions for tangled that I've seen before include "Intertwined" , "All twisted together" , "''Oh what a ... web we weave / when first we practise to deceive'' (Walter Scott)" , "Knotted" , "Entwined" .)