Soil behind Henry's house (6)
I believe the answer is:
hearth
'house' is the definition.
(thesaurus)
'soil behind henry's' is the wordplay.
'soil' becomes 'earth' (synonyms).
'behind' means one lot of letters go next to another.
'henry' becomes 'H' (symbol for the unit of electrical inductance).
'earth' put after 'h' is 'HEARTH'.
(Other definitions for hearth that I've seen before include "Area around fireplace" , "Floor around fireplace" , "site for cricket" , "cosy setting" , "home circle" .)