Forefather found in Port Gore in trouble? (10)
I believe the answer is:
progenitor
'forefather' is the definition.
(I've seen this before)
'in port gore in trouble?' is the wordplay.
'in trouble?' indicates anagramming the letters (I've seen 'in trouble' mean this).
'in'+'port'+'gore'='inportgore'
'inportgore' with letters rearranged gives 'PROGENITOR'.
'found' acts as a link.
(Other definitions for progenitor that I've seen before include "Forefather" , "Ancestor" , "dad" , "Forebear" , "founder" .)