Leak? Refer to hotel employee (7)
I believe the answer is:
seepage
'leak?' is the definition.
(I've seen this before)
'refer to hotel employee' is the wordplay.
'refer to' becomes 'see'.
'hotel employee' becomes 'page' (I've seen this in other clues).
'see'+'page'='SEEPAGE'
(Other definitions for seepage that I've seen before include "running out slowly" , "Slow leakage" , "slow escape" , "Percolation" , "narrow escape?" .)