Fishermen lay sea nets to trap their catch (8, 2 words).
This is a Printer's devilry clue, which together with 29 across, suggests SAND EELS. But I can't make a sensible sentence out of the clue with SAND EELS inserted.
Happy New Year pcoles, 34A Fishermen lay sea nets to trap their catch (8,2words) I agree with your answer SAND EELS. My interpretation is that the Undeviled Version would be Fishermen lay seans and eel sets to trap their catch. breaking the "deviled version" after the n of nets. Sean is given as an alternative to seine (a large fishing net). No guarantee that this is correct but this is how I solved this clue.