Spaghetti made by father and son with volunteers (5)
I believe the answer is:
pasta
'spaghetti' is the definition.
(I've seen this in another clue)
'father and son with volunteers' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'and' is a charade indicator (letters next to each other).
'son' becomes 's' (genealogical abbreviation for son).
'with' says to put letters next to each other.
'volunteers' becomes 'TA' (abbreviation for Territorial Army).
'pa'+'s'+'ta'='PASTA'
'made by' is the link.
(Other definitions for pasta that I've seen before include "dish of food" , "Staple food of Italian origin" , "Spaghetti, orzo etc" , "dish from Italy" , "dish high in carbohydrates" .)