Should doctors go around in very dry periods? (8)

'very dry periods?' is the definition.
'droughts' can be an answer for 'periods?' (drought is a kind of period). I'm not sure about the 'very dry' bit.

'should doctors go around' is the wordplay.
'should' becomes 'ought' (synonyms).
'doctors' becomes 'Drs' ('Dr' can be a synonym of 'doctor').
'go around' means one lot of letters goes inside another.
'ought' put within 'drs' is 'DROUGHTS'.

'in' is the link.

Can you help me to learn more?