TGIF part (5)
'tgif part' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for its that I've seen before include "Belonging to something nonhuman" , "Neuter possessive pronoun" , "Belonging to a particular thing" , "Another form of 'tis" , "The thing's" .)
(Other definitions for thank that I've seen before include "give credit" , "Blame" , "Acknowledge" , "Express gratitude" , "Express appreciation to" .)