Keen to laze around inside the house (7)
I believe the answer is:
zealous
'keen' is the definition.
(thesaurus)
'laze around inside the house' is the wordplay.
'around' indicates an anagram.
'inside' means to look at the middle letters.
The centre of 'house' is 'ous'.
'laze' anagrammed gives 'zeal'.
'zeal'+'ous'='ZEALOUS'
'to' is the link.
(Other definitions for zealous that I've seen before include "Fanatical" , "Very devoted to a cause" , "Ardent - devoted" , "Showing great energy and enthusiasm" , "Dedicated" .)