Quarrel following strike call (4,3)
I believe the answer is:
fall out
'quarrel' is the definition.
(falling out is a kind of quarrelling)
'following strike call' is the wordplay.
'following' becomes 'f' (used when citing page numbers etc).
'strike call' becomes 'allout' (as in an all-out strike).
'f'+'allout'='FALL-OUT'
(Other definitions for fall out that I've seen before include "Happen" , "Radioactive pollution" , "disagree" , "Quarrel - leave the ranks" .)