Stuff for which mother needs extra time (6)
I believe the answer is:
matter
'stuff' is the definition.
(matter is stuff or substance)
'mother needs extra time' is the wordplay.
I cannot quite see how this works, but
'mother' could be 'ma' (ma can mean mother) and 'ma' is located in the answer.
'time' could be 't' (abbreviation) and 't' is located in the answer.
The remaining letters 'ter' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'for which' is the link.
Can you help me to learn more?
(Other definitions for matter that I've seen before include "Substance as opposed to spirit" , "See 18" , "It occupies space, has substance" , "Concern" , "Physical substance" .)