Fitting carpets on a regular basis (3)
I believe the answer is:
apt
'fitting' is the definition.
(both mean appropriate)
'carpets on a regular basis' is the wordplay.
'on a regular basis' means one should take alternating letters.
The alternate letters of 'carpets' are 'APT'.
(Other definitions for apt that I've seen before include "Suitable or likely" , "Fitting - inclined" , "suitable for the circumstances" , "Ready to learn" , "Inclined; appropriate" .)