Regular outgoing covering goal and old kit (7)
I believe the answer is:
raiment
'regular outgoing covering' is the definition.
'raiment' can be an answer for 'covering' (raiment is a kind of covering). I am not sure about the 'regular outgoing' bit.
'goal and old kit' is the wordplay.
I cannot quite see how this works, but
'goal' could be 'aim' (aim is a kind of goal) and 'aim' is present in the answer.
'and' could be 'n' (common abbreviation for 'and') and 'n' is present in the answer.
The remaining letters 'ret' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for raiment that I've seen before include "Something put on" , "Gear" , "Clothing (literary)" , "Traditional clothing" , "Clothing (poetically)" .)