Rumblings below after those hottish starters? (7)
I believe the answer is:
thunder
'rumblings' is the definition.
(I have seen 'Meteorological rumblings' mean 'thunder' so perhaps 'rumblings' could also mean 'thunder')
'below after those hottish starters?' is the wordplay.
'below' becomes 'under' (synonyms).
'after' says to put letters next to each other.
'starters?' says to take the initial letters (I've seen 'starter' mean this).
The initial letters of 'those hottish' is 'th'.
'under' after 'th' is 'THUNDER'.
(Other definitions for thunder that I've seen before include "Rumble after lightning" , "Loud and prolonged noise in the sky" , "Booming noise from the heavens" , "Stormy peal" , "Hurt Ned (anag) - loud noise" .)