In Hackney, every now and then, daughter stripped (5)
I believe the answer is:
naked
'stripped' is the definition.
(I've seen this in another clue)
'in hackney every now and then daughter' is the wordplay.
'every now and then' means one should take alternating letters (letters selected at regular intervals).
'daughter' becomes 'd' (genealogical abbreviation).
'in'+'hackney'='inhackney'
The alternate letters of 'inhackney' are 'nake'.
'nake'+'d'='NAKED'
(Other definitions for naked that I've seen before include "Knead (anag.)" , "being exposed" , "in the emperor's new clothes?" , "Defenceless" , "Nude" .)