7. Single male penetrates novel in Dutch (9) U_H_T_H_D

You already have single = unhitched (direct)

he (male) included in (penetrates) unhitcd (anagram [novel] of "in dutch") = unhitc(he)d

Thank you Jema: I should have thought of that, but an anagram did not cross my mind!

For #6, "pan", as a prefix, means all and the edge of infancy is "i"?

Thanks: that works, and I must remember that use of pan!

Apologies for tardy response, but we were travelling back from France and then I was busy at work!