Pained again but got there! (7)
I believe the answer is:
reached
'got there' is the definition.
'reached' can be an answer for 'got' (reaching is a kind of getting). I'm unsure of the 'there' bit.
'pained again' is the wordplay.
I cannot quite see how this works, but
'pained' could be 'ached' (I've seen this in another clue) and 'ached' is found in the answer.
'again' could be 're' (prefix meaning 'again') and 're' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'but' acts as a link.
Can you help me to learn more?
(Other definitions for reached that I've seen before include "Came to (a place)" , "Stretched or arrived" , "Attained" , "Cad here (anag.)" .)