Father's wearing Tyson jogging pants (1-6)
I believe the answer is:
y-fronts
'pants' is the definition.
(I've seen this before)
'father's wearing tyson jogging' is the wordplay.
I cannot really understand how this works, but
'father' could be 'fr' (abbreviation as in a priest's title) and 'fr' is present in the answer.
an anagram of 'tyson' is 'yonts' which is located in the remaining letters.
No letters remain.
This explanation may well be incorrect...
(Other definitions for y-fronts that I've seen before include "briefs" , "Pants for men" , "Style of underpants" , "Male undergarment" , "Men's underwear" .)