Crossword Genius

In that case they should have some aperitifs, obviously (4)

Ross

I believe the answer is:

ifso

I'm a little stuck... Click here to teach me more about this clue!

'in that case they should' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.

'some aperitifs obviously' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'IFSO' is hidden within 'aperitifs obviously'.

'have' is the link.

Can you help me to learn more?

I've seen this clue in The Irish Times.
Want a hint initially instead of a full solution? Install my app