Tie small daughter, a hazard in the garden (8)
I believe the answer is:
knotweed
'a hazard in the garden' is the definition.
(plant that can cause structural damage)
'tie small daughter' is the wordplay.
'tie' becomes 'knot' (knotting is a kind of tiing).
'small' becomes 'wee' (Scottish term for small).
'daughter' becomes 'd' (genealogical abbreviation).
'knot'+'wee'+'d'='KNOTWEED'
(Other definitions for knotweed that I've seen before include "Common plant with jointed creeping stems" , "it has swollen joints" , "Common plant of dock family" , "Japanese invasive plant species" , "Plant of Polygonum genus" .)