Father accepts one dry type of bread (5)
I believe the answer is:
pitta
'type of bread' is the definition.
(I've seen this before)
'father accepts one dry' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'accepts' indicates putting letters inside.
'one' becomes 'i' (Roman numeral).
'dry' becomes 'tt' (abbreviation for teetotal).
'i'+'tt'='itt'
'pa' placed around 'itt' is 'PITTA'.
(Other definitions for pitta that I've seen before include "Flat hollow unleavened bread" , "Type of flatbread" , "Greek unleavened bread" , "Flat bread that's split to take a filling" , "Partially-leavened bread of the Near East" .)