6 & 10 across 'Develop arts to to obtain spun swaddling lace (2 words 4,5)
I have ?o?t s?r?p I would be grateful for any help - Ive spent ages on this one.
Many thanks sandyRoe & Bibblebub. I am pleased that you led me to the explanation otherwise I would still be puzzling how 'boot strap was arrived at. All is now clear so I can relax.