Crossword Help Forum
Forum Rules

1 3Ac Innocuous imprecation from the Pied Piper, (4)
21Ac ... this way, plodding a track homeward,(4) P ? ??
7Dn Network of blood vessels- for some more technically-minded (4)
Please

1. rats! ?

could 21a be path ? the initial letters of the clue

I have answered for ,
13a, rats
21a,Path
7d, Rete

7D RETE (it's 'in' there)

21a path (initils oflast 4 words)
7d rete (included in "more technically")

Thank you all very much ,cheers