See you excessively hugging dog with no lead (6-2)
I believe the answer is:
toodle-oo
'see you' is the definition.
(both can mean goodbye)
'excessively hugging dog with no lead' is the wordplay.
'excessively' becomes 'too' (to too great a degree).
'hugging' means one lot of letters goes inside another (outside letters hug or embrace inside letters).
'dog' becomes 'poodle' (breed of dog).
'with no lead' means to remove the first letter (the letter which leads the word is removed).
'poodle' with its first letter removed is 'oodle'.
'too' going around 'oodle' is 'TOODLE-OO'.
(Other definitions for toodle-oo that I've seen before include "See you later!" , "Bye!" , "Cheerio" , "Goodbye (dated)" , "Bye-bye!" .)