Texas Ranger, initially confused, runs (6)
I believe the answer is:
extras
'runs' is the definition.
Although both the answer and definition are plural nouns, I can't see how one could define the other.
'texas ranger initially confused' is the wordplay.
'initially' indicates taking the first letters.
'confused' indicates an anagram.
The first letter of 'ranger' is 'r'.
'texas'+'r'='texasr'
'texasr' anagrammed gives 'EXTRAS'.
Can you help me to learn more?
(Other definitions for extras that I've seen before include "Sundries" , "Minor actors in crowd scenes" , "Bit players in film" , "Additional items surplus to requirements, spares" , "People employed in crowd scenes in film" .)