Crossword Genius

Obstacle in golf, swaying from side to side (7)

Ross

I believe the answer is:

rocking

I'm a little stuck... Click here to teach me more about this clue!

'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?" .)

I've seen this clue in The Telegraph.
Want a hint initially instead of a full solution? Install my app