Pact resulting from for example abandoning loyalty (8)
I believe the answer is:
alliance
'pact' is the definition.
(alliance is a kind of pact)
'for example abandoning loyalty' is the wordplay.
'for example' becomes 'eg' (synonyms).
'abandoning' indicates named letters should be taken away.
'loyalty' becomes 'allegiance' (allegiance is a kind of loyalty).
'allegiance' with 'eg' taken away is 'ALLIANCE'.
'resulting from' acts as a link.
(Other definitions for alliance that I've seen before include "Coalition or union" , "Federation" , "Union, association" , "Combination by treaty" , "The joining by political agreement or treaty" .)