Tasteless hot drink I had (7)
I believe the answer is:
insipid
'tasteless' is the definition.
(similar in meaning)
'hot drink i had' is the wordplay.
'hot' becomes 'in' (both can mean fashionable).
'drink' becomes 'sip' (sipping is a kind of drinking).
'i had' becomes 'I'd' (contraction).
'in'+'sip'+'id'='INSIPID'
(Other definitions for insipid that I've seen before include "Lacking 10" , "devoid of flavour" , "Tasteless" , "Dull" , "Bland, flavourless" .)