Entering hotel, putting specs and card in receptacle (7,2)

I believe the answer is:

booking in

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'entering hotel' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'specs and card in receptacle' is the wordplay.
'specs' becomes 'OO' (OO looks like spectacles).
'and' says to put letters next to each other.
'card' becomes 'king' (type of playing card).
'in' is an insertion indicator.
'receptacle' becomes 'bin' (I've seen this in another clue).
'oo'+'king'='ooking'
'ooking' placed within 'bin' is 'BOOKING IN'.

'putting' acts as a link.

Can you help me to learn more?

I've seen this clue in The Times.

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