I am at home getting stuck into bowl in sink (8)
I believe the answer is:
diminish
'sink' is the definition.
(I've seen this before)
'i am at home getting stuck into bowl' is the wordplay.
'i am' becomes 'im'.
'at home' becomes 'in' ('in' can be similar in meaning to 'at home').
'getting' means one lot of letters go next to another.
'stuck into' indicates putting letters inside.
'bowl' becomes 'dish' (I've seen this before).
'im'+'in'='imin'
'imin' placed into 'dish' is 'DIMINISH'.
'in' acts as a link.
(Other definitions for diminish that I've seen before include "Drop" , "cut down" , "Make less with mini dish" , "Get smaller" , "Make reduction" .)