Jose's pal locates somewhat upset founders (9)
I believe the answer is:
collapses
'founders' is the definition.
('collapse' can be a synonym of 'founder')
'jose's pal locates somewhat upset' is the wordplay.
'somewhat' indicates the answer is hidden within the clue.
'upset' is a reversal indicator.
'sespalloc' can be found hidden inside 'joses pal locates'.
'sespalloc' written backwards gives 'COLLAPSES'.
(Other definitions for collapses that I've seen before include "founders" , "Suddenly falls down or gives way" .)