Connected new treadle (7)
I believe the answer is:
related
'connected' is the definition.
(I've seen this before)
'new treadle' is the wordplay.
'new' indicates anagramming the letters.
'treadle' with letters rearranged gives 'RELATED'.
(Other definitions for related that I've seen before include "Family members must be" , "Told in detail, being connected" , "Kindred" , "within family" , "Father and son have to be" .)