Marriage, for example, makes a nice change after all! (8)
I believe the answer is:
alliance
'marriage' is the definition.
(I've seen this before)
'a nice change after all' is the wordplay.
'change' indicates anagramming the letters.
'after' means one lot of letters go next to another.
'a'+'nice'='anice'
'anice' is an anagram of 'iance'.
'iance' after 'all' is 'ALLIANCE'.
'for example makes' is the link.
This may not be right. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for alliance that I've seen before include "Wanting marriage" , "match?" , "Combination by treaty" , "Marriage - union" , "Coalition or union" .)