Custodians or cooks pinching a case of red (8)
I believe the answer is:
Here is my best explanation:
'custodians' is the definition.
('steward' can be a synonym of 'custodian')
'cooks pinching a case of red' is the subsidiary indication.
'cooks' becomes 'stews' (stewing is a kind of cooking**).
'pinching' indicates putting letters inside (taking inside).
'case of' suggests removing the centre (outsides of).
'red' with its middle removed is 'rd'.
'stews' placed around 'ard' is 'stewards'.
'or' is the link.
(Other definitions for stewards that I've seen before include "Attendants, on aircraft say", "Crew members", "Custodians", "Officials at events", "They look after passengers on aircraft or ship", "Persons employed to manage estates", "Racing authorities", "waiters", "Those who manage property, etc for someone else" and "Officials who manage race meetings".)