Father with pair I know initially getting a spice (7)
I believe the answer is:
paprika
'a spice' is the definition.
(I know that paprika is a type of spice)
'father with pair i know initially' is the wordplay.
'father' becomes 'pa' (pa can mean dad or father).
'with' indicates putting letters inside.
'pair i' becomes 'apri' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'initially' says to take the initial letters.
The first letter of 'know' is 'k'.
'apri'+'k'='aprik'
'pa' placed around 'aprik' is 'PAPRIKA'.
'getting' is the link.
Can you help me to learn more?
(Other definitions for paprika that I've seen before include "Spice used in goulash" , "strong-tasting spice" , "Deep red spice" , "Sweet red pepper" , "Irk papa with mild red pepper" .)