Consuming mineral, I love being hostile (8)
I believe the answer is:
inimical
'hostile' is the definition.
('inimical' can be similar in meaning to 'hostile')
'consuming mineral i love' is the wordplay.
'consuming' indicates putting letters inside.
'mineral' becomes 'mica' (mica is a kind of mineral**).
'love' becomes 'nil' (I've seen this before).
'i'+'nil'='inil'
'mica' put inside 'inil' is 'INIMICAL'.
'being' is the link.
(Other definitions for inimical that I've seen before include "opposed" , "Hostile or harmful" , "Hostile, antagonistic" , "Injurious - hostile" , "Unfriendly or unfavourable" .)