At home, little drink I had is tasteless (7)
I believe the answer is:
insipid
'tasteless' is the definition.
(similar in meaning)
'at home little drink i had' is the wordplay.
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'little drink' becomes 'sip' (I've seen this before).
'i had' becomes 'i'd' (contraction).
'in'+'sip'+'id'='INSIPID'
'is' is the link.
(Other definitions for insipid that I've seen before include "flat" , "Jejune" , "dry" , "without taste" , "Colourless" .)