As a ballroom dance, possibly leave out 'Tango' (6)
I believe the answer is:
veleta
'as a ballroom dance' is the definition.
I can't judge whether this definition defines the answer.
'possibly leave out tango' is the wordplay.
'possibly' indicates an anagram.
'out' is an insertion indicator.
'tango' becomes 't' (phonetic alphabet: alpha, bravo, charlie etc.).
'leave' anagrammed gives 'velea'.
'velea' going around 't' is 'VELETA'.
Can you help me to learn more?
(Other definitions for veleta that I've seen before include "Fast dance in triple time" , "A form of slow waltz" .)