Good score from Texan golfer, occasionally (5)
I believe the answer is:
eagle
'good score' is the definition.
(I've seen this before)
'texan golfer occasionally' is the wordplay.
'occasionally' indicates alternate letters (letters taken at regular intervals or occasions).
'texan'+'golfer'='texangolfer'
The alternating letters of 'texangolfer' are 'EAGLE'.
'from' acts as a link.
(Other definitions for eagle that I've seen before include "Two under in 20 across" , "Symbolic American bird" , "two strokes fewer?" , "Bird of prey, may be golden" , "Keen-sighted bird of prey" .)