Butter needed for dad to finish breakfast (3)
I believe the answer is:
pat
'butter needed for' is the definition.
'pat' can be an answer for 'butter' (a pat can mean a lump of butter). I'm unsure of the 'needed for' bit.
'dad to finish breakfast' is the wordplay.
'dad' becomes 'pa' (synonyms).
'to finish' suggests the final letters.
The last letter of 'breakfast' is 't'.
'pa'+'t'='PAT'
Can you help me to learn more?
(Other definitions for pat that I've seen before include "Slick; dab" , "well-rehearsed" , "Light touch or stroke" , "Conveniently; light touch" , "Knob (of butter)" .)