Clue: Let that decaff brew on the hob for prodigal son (3,6,4)
Answer: THE FATTED CALF
Explanation: Let that decaff brew on the hob for prodigal son (3,6,4)
***(let that decaff) **[anag:*brew*] 
*(Not sure of the definition here – in the BIble (Luke), the parable of the profigal son includes a reference to "killing the fattened calf" to celebrate the son's return, but I doubt it would have been cooked on a hob?)