First to take worker drink for Paddy (7)
I believe the answer is:
tantrum
'paddy' is the definition.
(I've seen this before)
'first to take worker drink' is the wordplay.
'first to' says to take the initial letters.
'worker' becomes 'ant' (worker is a type of ant).
'drink' becomes 'rum' (rum is a kind of drink).
The initial letter of 'take' is 't'.
't'+'ant'+'rum'='TANTRUM'
'for' acts as a link.
(Other definitions for tantrum that I've seen before include "Fit of childish temper" , "Hissy fit" , "Frenzy" , "Fit of ill-temper" , "Pet, temper" .)