Collect tips from all members and shop stewards (5)

I believe the answer is:
amass
'collect' is the definition.
(synonyms)
'tips from all members and shop stewards' is the wordplay.
'tips from' suggests taking the first letters (letters on tips of the word).
The initial letters of 'all members and shop stewards' is 'AMASS'.
(Other definitions for amass that I've seen before include "Accumulate, pile up" , "Accumulate, heap up" , "Accrue, heap up" , "Gather together, pile up" , "Stock up on" .)