Chairs about entrance to cabins on ships (9)

'chairs' is the definition.
(recliner is a type of chair)

'about entrance to cabins on ships' is the wordplay.
'about' indicates putting letters inside.
'entrance to' says to take the initial letters.
'on' becomes 're' ('on' can be mean 'with reference to').
'ships' becomes 'liners' (liner is a kind of ship).
The initial letter of 'cabins' is 'c'.
're'+'liners'='reliners'
'c' put inside 'reliners' is 'RECLINERS'.