New sidesman receiving nothing in July, perhaps (3-6)

'july perhaps' is the definition.
(July is the middle of summer)

'new sidesman receiving nothing' is the wordplay.
'new' is an anagram indicator.
'receiving' means one lot of letters goes inside another.
'nothing' becomes 'O' (O resembles 0).
'sidesman' anagrammed gives 'midseasn'.
'midseasn' going around 'o' is 'MID-SEASON'.

'in' acts as a link.