Reminder to collect protective gear held up (7)

I believe the answer is:

propped

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'held up' is the definition.
'propped' can be an answer for 'held' (thesaurus). I am not certain of the 'up' bit.

'reminder to collect protective gear' is the wordplay.
'reminder' becomes 'prod' (I've seen this before).
'to collect' is an insertion indicator (inserted letters are collected by others).
'protective gear' becomes 'PPE' (abbreviation for personal protective equipment).
'prod' placed around 'ppe' is 'PROPPED'.

Can you help me to learn more?

(Other definitions for propped that I've seen before include "Supported, stayed" , "Leaning (against supporting object)" , "joined in?" .)

I've seen this clue in The Times.

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