Amateur to tease in bed (7)
I believe the answer is:
hammock
'bed' is the definition.
(I know that hammock is a type of bed)
'amateur to tease' is the wordplay.
'amateur' becomes 'ham'.
'to tease' becomes 'mock' (I've seen this in another clue).
'ham'+'mock'='HAMMOCK'
'in' acts as a link.
(Other definitions for hammock that I've seen before include "Resting place slung under tree etc" , "Hanging bed of canvas or rope" , "String bed" , "Bed tied between trees?B" , "Hanging cloth bed" .)