@SteveA6000 - yes you are correct.
It was unfamiliar to me too. With the clip in mind I had intended to use the word HAYWAIN (7) but to my surprise I found that this word is not given in Chambers (2014).
I did toy with the idea of using KNOCKERS (8) but didn't feel it would be a fun word to clue.
Chambers led me to HAYRIDE.