Predicament almost entirely due to quarrel (5)
I believe the answer is:
scrap
'quarrel' is the definition.
(thesaurus)
'predicament almost entirely' is the wordplay.
'predicament' becomes 'scrape' (I've seen this before).
'almost entirely' means to remove the last letter.
'scrape' with its last letter removed is 'SCRAP'.
'due to' acts as a link.
(Other definitions for scrap that I've seen before include "Axe" , "A fragment or an informal fight" , "Quarrel" , "Fragment or slangy fight" , "Small amount; fight" .)