Pleased bear pinching cheese runs back (8)
I believe the answer is:
grateful
'pleased' is the definition.
(thesaurus)
'bear pinching cheese runs back' is the wordplay.
'bear' becomes 'lug' (both can mean to carry around).
'pinching' is an insertion indicator (taking inside).
'cheese' becomes 'feta' (type of cheese).
'runs' becomes 'r' (cricket abbreviation).
'back' says the letters should be written in reverse.
'feta'+'r'='fetar'
'lug' placed around 'fetar' is 'lufetarg'.
'lufetarg' back-to-front is 'GRATEFUL'.
(Other definitions for grateful that I've seen before include "Beholden" , "quantity of coal" , "Thankful, appreciative" , "Showing thankfulness" , "Showing appreciation for kindness" .)