Butter bread extremely neatly (5)
I believe the answer is:
nanny
'butter' is the definition.
(I've seen this before)
'bread extremely neatly' is the wordplay.
'bread' becomes 'nan' (variant spelling of naan).
'extremely' says to hollow out the word (remove centre letters) (only the extremes of the word are used).
'neatly' with its middle taken out is 'ny'.
'nan'+'ny'='NANNY'
(Other definitions for nanny that I've seen before include "Carer for children" , "butter" , "Child minder - goat - grandma" , "She cares for kids" , "Issue tender" .)