Resident Medical Officer probes the data for in-house regulators (11)

'in-house regulators' is the definition.
'thermostats' can be an answer for 'regulators' (thermostat is a kind of regulator). I am not certain of the 'in-house' bit.

'resident medical officer probes the data' is the wordplay.
'resident medical officer' becomes 'rmo' (this could be a standard abbreviation I've not previously seen).
'probes' means one lot of letters goes inside another (probe can mean to poke or prod into).
'data' becomes 'stats' (statistics are a kind of data).
'the'+'stats'='thestats'
'rmo' inserted within 'thestats' is 'THERMOSTATS'.

'for' is the link.

Can you help me to learn more?