Ancient implement one thrown on fire by husband (7)
I believe the answer is:
neolith
'ancient implement' is the definition.
'neolith' can be an answer for 'implement' (I've seen this before). I'm unsure of the 'ancient' bit.
'one thrown on fire by husband' is the wordplay.
'thrown' indicates anagramming the letters.
'on' means one lot of letters go next to another.
'fire by' becomes 'lit' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'husband' becomes 'h'.
'one' with letters rearranged gives 'neo'.
'neo'+'lit'+'h'='NEOLITH'
Can you help me to learn more?
(Other definitions for neolith that I've seen before include "Prehistoric stone tool - hotline (anag)" , "maybe used at Stonehenge?" , "Old stone tool" , "Stone Age artefact" , "Ancient stone implement" .)