House: Philip entering to look at gardening aid (8)
I believe the answer is:
hosepipe
'gardening aid' is the definition.
(I've seen this before)
'house philip entering to look' is the wordplay.
'house' becomes 'ho' (abbreviation for house).
'philip' becomes 'pip' (can be a nickname for Philip).
'entering' is an insertion indicator.
'to look' becomes 'see'.
'pip' put within 'see' is 'sepipe'.
'ho'+'sepipe'='HOSEPIPE'
'at' is the link.
(Other definitions for hosepipe that I've seen before include "gardening aid" , "Use this in garden" , "Flexible tube for conveying water" , "Watering device" , "it will water garden" .)