Men hate being badly affected by firedamp (7)
I believe the answer is:
methane
'affected by firedamp' is the definition.
'methane' can be an answer for 'firedamp' (I've seen this before). I'm not certain of the 'affected by' bit.
'men hate being badly' is the wordplay.
'being badly' indicates an anagram.
'men'+'hate'='menhate'
'menhate' with letters rearranged gives 'METHANE'.
Can you help me to learn more?
(Other definitions for methane that I've seen before include "Main constituent of natural gas" , "Marsh-gas" , "contributor to global warming" , "Flammable gas, CH4" , "Greenhouse gas produced by cows" .)