Roman goddess requiring month off, originally (4)
I believe the answer is:
juno
'roman goddess' is the definition.
(I've seen this in another clue)
'month off originally' is the wordplay.
'month' becomes 'jun' (abbreviation for June).
'originally' indicates taking the first letters.
The first letter of 'off' is 'o'.
'jun'+'o'='JUNO'
'requiring' is the link.
(Other definitions for juno that I've seen before include "Fourth largest known asteroid" , "In Roman myth, goddess ofmarriage - to Paycock?" , "Jupiter's wife" , "Roman queen of the gods, wife and sister of Jupiter" , "She played with the Paycock" .)