Overweight Texas Ranger faces defeat (7)
I believe the answer is:
trounce
'defeat' is the definition.
(synonyms)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for trounce that I've seen before include "Aged skip" , "Thrash" , "Defeat decisively" , "Beat soundly" , "Beat thoroughly on recount" .)