Drink of tea caught up with pop (5)
I believe the answer is:
cuppa
'drink of tea' is the definition.
(I've seen this before)
'caught up with pop' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'with' means one lot of letters go next to another.
'pop' becomes 'pa' (both can mean father).
'c'+'up'+'pa'='CUPPA'
(Other definitions for cuppa that I've seen before include "Drink of tea (colloq.)" , "Refreshing brew" , "Drink of tea (informal)" .)