Obstacle in golf, swaying from side to side (7)
I believe the answer is:
rocking
'swaying from side to side' is the definition.
I can't tell whether this definition defines the answer.
'obstacle in golf' is the wordplay.
I cannot quite understand how this works, but
'in' is found in the answer.
'golf' could be 'g' (phonetic alphabet: alpha, bravo, charlie etc.) and 'g' is found in the answer.
The remaining letters 'rock' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for rocking that I've seen before include "Seat with curved supports" , "Moving from side to side" , "... chair, one that moves back and forth" , "Swaying" , "being unstable?" .)