Like gardens to be asymmetrical (5)
I believe the answer is:
askew
'be asymmetrical' is the definition.
(asymmetrical means askew or wonky)
'like gardens' is the wordplay.
'like' becomes 'as'.
'gardens' becomes 'Kew' (Kew Gardens in London).
'as'+'kew'='ASKEW'
'to' acts as a link.
(Other definitions for askew that I've seen before include "Obliquely" , "Out of line" , "Wakes (anag)" , "Leaning to one side" , "Off-centre" .)