He could be ready for this weekend although it is a little bit early in terms of fitness.BCFC
However, the Ecuador international is unlikely to figure against Leeds United at the weekend.
The on-loan Swansea City winger has been unavailable for selection since limping off just 29 minutes into his starting debut for Blues against Stoke City on the last day of August.
"He (Montero) has got over his injury now," said Clotet.
"He has had two weeks of physical training now to get him up to speed.
"He recovered much sooner than we expected, which is another sign of all the good professionals we have in the medical department.
"He could be ready for this weekend although it is a little bit early in terms of fitness."
Montero has been undergoing individual fitness work with Blues conditiong staff and physio and has yet to rejoin the main training group.
Meanwhile, Clotet says that former Brentford man Josh McEachran is almost up to speed in terms of his match fitness, having not had a pre-season.
"He (McEachran) is working very hard on his fitness levels, we are giving him as many matches as possible with the 23s because that's something you can only get there.
"We have improved physically in our team a lot, everyone in the staff has worked very hard to make sure we can sustain our football on a physical basis.
"The team has made a massive step up physically. Josh is coping very well on this little physical catch up he is doing, and we just hope he is ready as soon as possible.
"He needs to keep using those games to get up to speed because there we can guarantee him 90 minutes."
Elsewhere, Jonathan Grounds has served his Under-23s one-game suspension for being sent-off a week last Friday. And in terms of injuries, Maikel Kieftenbeld (knee) is the only player currently sidelined.