Lift from bed, if yawning (5)
I believe the answer is:
edify
'lift' is the definition.
(thesaurus)
'from bed if yawning' is the wordplay.
'from' indicates a hidden word.
'EDIFY' can be found hidden inside 'bed if yawning'.
(Other definitions for edify that I've seen before include "Change for the better" , "Improve morality, perhaps" , "Uplift; elevate" , "Strengthen spiritually" , "Enlighten" .)