Not a big row though it turns very noisy (4)
I believe the answer is:
tiff
'not a big row' is the definition.
I can't tell whether this definition defines the answer.
'it turns very noisy' is the wordplay.
'turns' says the letters should be written backwards.
'very noisy' becomes 'ff'.
'it' reversed gives 'ti'.
'ti'+'ff'='TIFF'
'though' is the link.
Can you help me to learn more?
(Other definitions for tiff that I've seen before include "Slight quarrel" , "(Lovers') quarrel" , "A petty quarrel or difference" , "pet" , "Petty argument" .)