The religious leader crossing river brings drink containers (9)

I believe the answer is:

thermoses

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'drink containers' is the definition.
'thermoses' can be an answer for 'containers' (thermos is a kind of container). I am not sure about the 'drink' bit.

'the religious leader crossing river' is the wordplay.
'religious leader' becomes 'moses' (Moses is an example).
'crossing' means one lot of letters goes inside another.
'river' becomes 'r' (abbreviation for river).
'the'+'moses'='themoses'
'themoses' enclosing 'r' is 'THERMOSES'.

'brings' acts as a link.

Can you help me to learn more?

I've seen this clue in The Guardian.

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